Revert "README: Add Kickstarter link."

This reverts commit b7aaad60308856611349079288bdb274668e4a16.

README.md

@@ -2,12 +2,6 @@ Homebrew
 ========
 Features, usage and installation instructions are [summarized on the homepage][home].
 
-Kickstarter
------------
-
-Please [back our Kickstarter](http://www.kickstarter.com/projects/homebrew/brew-test-bot) before March 6th:  
-[![Homebrew brew-test-bot Kickstarter](http://f.cl.ly/items/2c0D160A1B2z2S280H33/kickstarter.png)](http://www.kickstarter.com/projects/homebrew/brew-test-bot)
-
 What Packages Are Available?
 ----------------------------
 1. You can [browse the Formula directory on GitHub][formula].