This was only used by 2 formuale in homebrew-core.
One formula did not need the flag anymore and the flag was removed
The other formula (rogue) still needs it, the flag was directly
added to the formula.

There is no reason for us to keep this method.

Fixes #7597.

Remove usage where `Homebrew.args` could be used instead or, due to the
`Homebrew.args` parsing, there was dead code that was never executed
(and no-one complained about not working).

Part of https://github.com/Homebrew/brew/issues/5730

Refactor the CLI::Args module so it doesn't have different paths to
check arguments depending on whether the arguments have been parsed or
not. Instead, set the values we need from the global ARGV at
first, global initialisation time where they will be thrown away when
the actual arguments are parsed.

To do this some other general refactoring was needed:
- more methods made private when possible
- e.g. `HEAD?` used consistently instead of `head` before arguments
  are parsed.
- formula options are only parsed after named arguments are extracted

- Only try to call `.match?` on strings that aren't nil.

- This also required auto-fixes for Layout/EmptyLinesAroundBlockBody and
  Layout/InconsistentIndentation once the auto-fixer had got rid of the
  "redundant begin"s.

And remove all dead/unneeded code.

- Add some `odeprecated`
- Make some `odeprecated` now `odisabled`
- Remove `odisabled` code.
- Remove old update migrations
- Remove GCC 4.0 compiler
- Remove Tiger-only code
- Remove 32-bit-only code
- Remove use of LD64
- Remove GCC 4.3 - 4.8 support.

This reduces the deviation in compilation flags on a given OS between
users and between bottling/not bottling to provide a consistent
behaviour for debugging and support.

ENV.cxx11 in a test block fails on Linux with
Error: ibex: failed
An exception occurred within a child process:
NoMethodError: undefined method `non_apple_gcc_version'
See for example brew test ibex on Linux.

Sanitize the Linux environment variables
LD_LIBRARY_PATH LD_PRELOAD LD_RUN_PATH

append_to_cccfg properly appends values to HOMEBREW_CCCFG variable

Fix some checks for `:clang` which should match for either `:clang` or
`:llvm_clang`. Note that's not every check.

Fix various circular requirements, method redefinitions, etc.