putty: remove caveats

Formula/putty.rb

@@ -3,7 +3,7 @@ require 'formula'
 class Putty < Formula
   homepage 'http://www.chiark.greenend.org.uk/~sgtatham/putty/'
   url 'http://the.earth.li/~sgtatham/putty/0.62/putty-0.62.tar.gz'
-  md5 '1344b606a680a9036df0fc3a05e62e71'
+  sha1 '5898438614117ee7e3704fc3f30a3c4bf2041380'
 
   def install
     # use the unix build to make all PuTTY command line tools
@@ -20,8 +20,4 @@ class Putty < Formula
       man1.install %w{ plink.1 pscp.1 psftp.1 puttygen.1 }
     end
   end
-
-  def caveats
-    "This formula did not build the Mac OS X GUI PuTTY.app."
-  end
 end