Remove last monkeypatch

Library/ENV/4.3/cc

@@ -1,6 +1,6 @@
 #!/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby -W0
 
-require File.expand_path("../libsuperenv", File.dirname(__FILE__))
+$:.unshift "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8"
 require 'pathname'
 require 'set'
 require 'stringio'
@@ -147,11 +147,11 @@ class Cmd
         args << "-Wl,#{arg}"
       when /^-I(.+)?/
         # Support both "-Ifoo" (one argument) and "-I foo" (two arguments)
-        val  = $1.chuzzle || whittler.next
+        val  = chuzzle($1) || whittler.next
         path = canonical_path(val)
         args << "-I#{val}" if keep?(path) and iset.add?(path)
       when /^-L(.+)?/
-        val  = $1.chuzzle || whittler.next
+        val  = chuzzle($1) || whittler.next
         path = canonical_path(val)
         args << "-L#{val}" if keep?(path) and lset.add?(path)
       else
@@ -283,13 +283,18 @@ class Cmd
   def path_split(key)
     ENV.fetch(key) { "" }.split(File::PATH_SEPARATOR)
   end
+  def chuzzle(val)
+    return val if val.nil?
+    val = val.chomp
+    return val unless val.empty?
+  end
 end
 
 if __FILE__ == $PROGRAM_NAME
   ##################################################################### sanity
   abort "The build-tool has reset ENV. --env=std required." unless ENV['HOMEBREW_BREW_FILE']
 
-  case ENV['HOMEBREW_CC'].chuzzle when 'cc', nil
+  if (cc = ENV["HOMEBREW_CC"]).nil? || cc.empty? || cc == "cc"
     # those values are not allowed
     ENV['HOMEBREW_CC'] = 'clang'
   end

Library/ENV/libsuperenv.rb

@@ -1,14 +0,0 @@
-# Yes, a good deal of this could be imported from Homebrew-proper
-# But Homebrew-proper is dog-slow currently, and I didn't want every cc
-# instantiation to be slower by a tangible amount.
-
-# https://github.com/Homebrew/homebrew-versions/issues/47
-$:.unshift "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8"
-
-class String
-  def chuzzle; s = chomp; s unless s.empty? end
-end
-
-class NilClass
-  def chuzzle; end
-end