Remove license from all documentation

Library/Homebrew/cask/doc/cask_language_reference/all_stanzas.md

@@ -11,7 +11,6 @@ Each of the following stanzas is required for every Cask.
 | `url`              | no                            | URL to the `.dmg`/`.zip`/`.tgz`/`.tbz2` file that contains the application.<br />A [comment](stanzas/url.md#when-url-and-homepage-hostnames-differ-add-a-comment) should be added if the hostnames in the `url` and `homepage` stanzas differ. Block syntax should be used for URLs that change on every visit.<br />See [URL Stanza Details](stanzas/url.md) for more information.
 | `name`             | yes                           | a string providing the full and proper name defined by the vendor (see also [Name Stanza Details](stanzas/name.md))
 | `homepage`         | no                            | application homepage; used for the `brew cask home` command
-| `license`          | no                            | a symbol identifying the license category for the application (see also [License Stanza Details](stanzas/license.md))
 
 ## At Least One Artifact Stanza Is Also Required
 

Library/Homebrew/cask/doc/cask_language_reference/readme.md

@@ -12,7 +12,6 @@ cask 'alfred' do
   url "https://cachefly.alfredapp.com/Alfred_#{version}.zip"
   name 'Alfred'
   homepage 'https://www.alfredapp.com/'
-  license :freemium
 
   app 'Alfred 2.app'
   app 'Alfred 2.app/Contents/Preferences/Alfred Preferences.app'
@@ -88,7 +87,6 @@ cask 'myapp' do
   name 'MyApp'
   version '1.0'
   sha256 'a32565cdb1673f4071593d4cc9e1c26bc884218b62fef8abc450daa47ba8fa92'
-  license :unknown
 
   url "https://#{Utils.arbitrary_method}"
   homepage 'https://www.example.com/'
@@ -129,7 +127,6 @@ appcast,
   checkpoint: # shown here as it is required with `appcast`
 name
 homepage
-license
 gpg, key_id: # on same line, since first part is typically small
 
 auto_updates

Library/Homebrew/cask/doc/cask_language_reference/stanzas/license.md

-# license
-
-The `license` stanza is not free-form. A single value must be chosen from a list of valid symbols.
-
-The values for `license` are categories, rather than fully-specified licenses. For example, `:gpl` is a category; we do not distinguish between versions of the GPL. Similarly, `:cc` and `:bsd` comprise many variants. They must always pertain to the license of the software itself, not the vendor’s business model (a free app to access a paid service is still `:gratis`, not `:freemium`).
-
-The `license` stanza is intended as an aid to search/filtering of Casks. For full and complete information, the user must always rely on the vendor’s homepage.
-
-Note that `brew cask search` and `brew cask list` are not yet capable of using the information stored in the `license` stanza.
-
-## Generic Category Licenses
-
-Cask authors should use the most specific license category which is also correct. Generic categories are provided for difficult cases. `:unknown` is also perfectly fine if you are unsure.
-
-Example: [Chromium](https://www.chromium.org/chromium-os/licenses) includes code with multiple licenses, all of which are open source. Chromium licensing is described by the generic category [`:oss`](https://github.com/caskroom/homebrew-cask/blob/54a79f7dcceea9a922a5b608ac99466b9d10a191/Casks/chromium.rb#L7).
-
-| symbol      | meaning     |
-| ----------- | ----------- |
-| `:oss`      | open-source software
-| `:closed`   | closed-source software
-| `:unknown`  | license unknown
-| `:other`    | license is known, but fits no category
-
-## Valid Licenses
-
-| symbol           | generic category | meaning                                                            | URL         |
-| ---------------- | ---------------- | ------------------------------------------------------------------ | ----------- |
-| `:gratis`        | `:closed`        | free-to-use, closed source                                         | <none>
-| `:commercial`    | `:closed`        | not free to use                                                    | <none>
-| `:freemium`      | `:closed`        | free-to-use, payment required for full or additional functionality | <https://en.wikipedia.org/wiki/Freemium>
-| `:affero`        | `:oss`           | Affero General Public License                                      | <https://gnu.org/licenses/agpl.html>
-| `:apache`        | `:oss`           | Apache Public License                                              | <https://www.apache.org/licenses/>
-| `:arphic`        | `:oss`           | Arphic Public License                                              | <http://www.arphic.com/tw/download/public_license.rar>
-| `:artistic`      | `:oss`           | Artistic License                                                   | <https://dev.perl.org/licenses/artistic.html>
-| `:bsd`           | `:oss`           | BSD License                                                        | <http://www.linfo.org/bsdlicense.html>
-| `:cc`            | `:oss`           | Creative Commons License                                           | <https://creativecommons.org/licenses/>
-| `:eclipse`       | `:oss`           | Eclipse Public License                                             | <https://www.eclipse.org/legal/eplfaq.php>
-| `:gpl`           | `:oss`           | GNU Public License                                                 | <https://www.gnu.org/copyleft/gpl.html>
-| `:isc`           | `:oss`           | Internet Systems Consortium License                                | <https://www.isc.org/downloads/software-support-policy/isc-license/>
-| `:lppl`          | `:oss`           | LaTeX Project Public License                                       | <https://latex-project.org/lppl/>
-| `:ncsa`          | `:oss`           | University of Illinois/NCSA Open Source License                    | <http://otm.illinois.edu/uiuc_openSource>
-| `:mit`           | `:oss`           | MIT License                                                        | <https://opensource.org/licenses/MIT>
-| `:mpl`           | `:oss`           | Mozilla Public License                                             | <https://www.mozilla.org/MPL/>
-| `:ofl`           | `:oss`           | SIL Open Font License                                              | <https://scripts.sil.org/OFL>
-| `:public_domain` | `:oss`           | not copyrighted                                                    | <https://creativecommons.org/publicdomain/zero/1.0/legalcode>
-| `:ubuntu_font`   | `:oss`           | Ubuntu Font License                                                | <http://font.ubuntu.com/licence/>
-| `:x11`           | `:oss`           | X Consortium License                                               | <http://www.xfree86.org/3.3.6/COPYRIGHT2.html>

Library/Homebrew/cask/doc/development/adding_a_cask.md

@@ -17,7 +17,6 @@ cask 'shuttle' do
           checkpoint: 'c3dea2ed479b3ebba7c56ace6040901795f6dc6be92f9ffc30cc808d31723f17'
   name 'Shuttle'
   homepage 'https://fitztrev.github.io/shuttle/'
-  license :mit
 
   app 'Shuttle.app'
 
@@ -36,7 +35,6 @@ cask 'airstream' do
   url 'https://s3-us-west-2.amazonaws.com/airstream-clients/mac/airstream-mac.dmg'
   name 'AirStream'
   homepage 'http://airstream.io/download/'
-  license :gratis
 
   app 'AirStream.app'
 
@@ -58,7 +56,6 @@ cask 'airdisplay' do
           checkpoint: '938bdb9fbee793dce92818366cb2c19ba84c5b0cd6853fd893897d4a40689bc2'
   name 'Air Display'
   homepage 'https://avatron.com/apps/air-display/'
-  license :commercial
 
   pkg 'Air Display Installer.pkg'
 
@@ -102,7 +99,6 @@ cask 'my-new-cask' do
   url ''
   name ''
   homepage ''
-  license :unknown # TODO: change license and remove this comment; ':unknown' is a machine-generated placeholder
 
   app ''
 end
@@ -119,7 +115,6 @@ Fill in the following stanzas for your Cask:
 | `url`              | URL to the `.dmg`/`.zip`/`.tgz`/`.tbz2` file that contains the application.<br />A [comment](../cask_language_reference/stanzas/url.md#when-url-and-homepage-hostnames-differ-add-a-comment) should be added if the hostnames in the `url` and `homepage` stanzas differ. Block syntax should be used for URLs that change on every visit.<br />See [URL Stanza Details](../cask_language_reference/stanzas/url.md) for more information.
 | `name`             | the full and proper name defined by the vendor, and any useful alternate names (see [Name Stanza Details](../cask_language_reference/stanzas/name.md))
 | `homepage`         | application homepage; used for the `brew cask home` command
-| `license`          | a symbol identifying the license for the application. Valid category licenses include `:oss`, `:closed`, and `:unknown`. It is OK to leave as `:unknown`. (see [License Stanza Details](../cask_language_reference/stanzas/license.md))
 | `app`              | relative path to an `.app` bundle that should be moved into the `/Applications` folder on installation (see [App Stanza Details](../cask_language_reference/stanzas/app.md))
 
 Other commonly-used stanzas are:

Library/Homebrew/cask/lib/hbc/cli/create.rb

@@ -26,7 +26,6 @@ module Hbc
             url 'https://'
             name ''
             homepage ''
-            license :unknown # TODO: change license and remove this comment; ':unknown' is a machine-generated placeholder
 
             app ''
           end