setup: drop statement of support for Python before 3.5.3

🎉🎉

Differential Revision: https://phab.mercurial-scm.org/D12266

setup.py

@@ -13,15 +13,7 b' import os'
 # bug link: https://bugs.python.org/issue25270
 supportedpy = ','.join(
     [
-        '>=2.7.4',
-        '!=3.0.*',
-        '!=3.1.*',
-        '!=3.2.*',
-        '!=3.3.*',
-        '!=3.4.*',
-        '!=3.5.0',
-        '!=3.5.1',
-        '!=3.5.2',
+        '>=3.5.3',
         '!=3.6.0',
         '!=3.6.1',
     ]
@@ -37,7 +29,6 b' if sys.version_info[0] >= 3:'
     def sysstr(s):
         return s.decode('latin-1')
 
-
 else:
     libdir_escape = 'string_escape'