Revert "SDK-401: Fix inflection version upgrade on basis of python ve…

…rsion (#316)"

This reverts commit 8bf79f9.

setup.py

@@ -2,14 +2,9 @@
 import sys
 from setuptools import setup
 
-INSTALL_REQUIRES = ['requests >=2.21.0', 'boto >=2.45.0', 'six >=1.12.0',
-                    'urllib3 >= 1.24.3']
+INSTALL_REQUIRES = ['requests >=1.0.3', 'boto >=2.45.0', 'six >=1.2.0', 'urllib3 >= 1.0.2', 'inflection >= 0.3.1']
 if sys.version_info < (2, 7, 0):
     INSTALL_REQUIRES.append('argparse>=1.1')
-if sys.version_info < (3, 5):
-    INSTALL_REQUIRES.append('inflection==0.3.1')
-else:
-    INSTALL_REQUIRES.append('inflection>=0.3.1')
 
 
 def read(fname):