[setup] don't remove xrange fixer from 3to2

to see where transformations actually fail

setup.py

@@ -120,7 +120,7 @@ def __init__(self, *args, **kwargs):
                 'printfunction', 'raise', 'range', 'reduce', 'setliteral', 'str', 'super', 'throw', 'unittest',
                 'unpacking', 'with')]
 
-        for fix in ('fix_except', 'fix_int', 'fix_print', 'fix_range', 'fix_str', 'fix_throw',
+        for fix in ('fix_except', 'fix_int', 'fix_print', 'fix_str', 'fix_throw',
                 'fix_unittest', 'fix_absimport', 'fix_dctsetcomp', 'fix_setliteral', 'fix_with', 'fix_open'):
             fixers.remove('lib3to2.fixes.{}'.format(fix))
         fixers.append('fix_pymor_futures')