Remove patch hacks from audit

Library/Homebrew/cmd/audit.rb

@@ -36,13 +36,6 @@ module Homebrew
   end
 end
 
-class Module
-  def redefine_const(name, value)
-    __send__(:remove_const, name) if const_defined?(name)
-    const_set(name, value)
-  end
-end
-
 # Formula extensions for auditing
 class Formula
   def head_only?
@@ -101,9 +94,6 @@ class FormulaAuditor
     @problems = []
     @text = f.text.without_patch
     @specs = %w{stable devel head}.map { |s| f.send(s) }.compact
-
-    # We need to do this in case the formula defines a patch that uses DATA.
-    f.class.redefine_const :DATA, ""
   end
 
   def audit_file