Remove usless comments.

Library/Homebrew/diagnostic.rb

@@ -1097,7 +1097,7 @@ module Homebrew
       def all
         methods.map(&:to_s).grep(/^check_/)
       end
-    end # end class Checks
+    end
   end
 end
 

Library/Homebrew/language/python.rb

@@ -245,7 +245,7 @@ module Language
                           "-v", "--no-deps", "--no-binary", ":all:",
                           "--ignore-installed", *targets
         end
-      end # class Virtualenv
+      end
-    end # module Virtualenv
+    end
-  end # module Python
+  end
-end # module Language
+end