python: Remove outdated fix

Since 2.7.5 the `python-config --ldflags` is not fixed but Python does
not use the Makefile any longer for this. We fix this now in our
`sitecustomize.py`.

Library/Formula/python.rb

@@ -166,13 +166,6 @@ def install
           _sre.MAXREPEAT = 65535 # this monkey-patches all other places of "from _sre import MAXREPEAT"'
       EOS
 
-      # Fixes setting Python build flags for certain software
-      # See: https://github.com/mxcl/homebrew/pull/20182
-      # http://bugs.python.org/issue3588
-      inreplace "#{prefix}/Frameworks/Python.framework/Versions/2.7/lib/python2.7/config/Makefile" do |s|
-        s.change_make_var! "LINKFORSHARED",
-          "-u _PyMac_Error $(PYTHONFRAMEWORKINSTALLDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)"
-      end
   end
 
   def distutils_fix_superenv(args)