Remove unused :force switches

The :force behavior for ENV.gcc has been the default for some time, and
was used to force vanilla gcc in case the gcc symlink pointed at
llvm-gcc; for ENV.clang, this doesn't mattera as clang is just clang.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Library/Homebrew/extend/ENV.rb

@@ -126,7 +126,7 @@ module HomebrewEnvExtension
     ENV['CXX'] = `/usr/bin/xcrun -find #{$1}`.chomp if $1
   end
 
-  def gcc args = {}
+  def gcc
     # Apple stopped shipping gcc-4.2 with Xcode 4.2
     # However they still provide a gcc symlink to llvm
     # But we don't want LLVM of course.
@@ -157,7 +157,7 @@ module HomebrewEnvExtension
     @compiler = :llvm
   end
 
-  def clang args = {}
+  def clang
     self['CC']  = xcrun "clang"
     self['CXX'] = xcrun "clang++"
     replace_in_cflags(/-Xarch_i386 (-march=\S*)/, '\1')

Library/Homebrew/formula.rb

@@ -256,10 +256,10 @@ class Formula
       if llvm.build.to_i >= 2336
         if MacOS.xcode_version < "4.2"
           opoo "Formula will not build with LLVM, using GCC"
-          ENV.gcc :force => true
+          ENV.gcc
         else
           opoo "Formula will not build with LLVM, trying Clang"
-          ENV.clang :force => true
+          ENV.clang
         end
         return
       end