chore(revert): revert preventing normalization (googleapis#318)

Author: dandhlee

setup.py

@@ -17,21 +17,6 @@
 
 import setuptools
 
-# Disable version normalization performed by setuptools.setup()
-try:
- # Try the approach of using sic(), added in setuptools 46.1.0
- from setuptools import sic
-except ImportError:
- # Try the approach of replacing packaging.version.Version
- sic = lambda v: v
- try:
- # setuptools >=39.0.0 uses packaging from setuptools.extern
- from setuptools.extern import packaging
- except ImportError:
- # setuptools <39.0.0 uses packaging from pkg_resources.extern
- from pkg_resources.extern import packaging
- packaging.version.Version = packaging.version.LegacyVersion
-
 
 # Package metadata.
 
@@ -84,7 +69,7 @@
 
 setuptools.setup(
  name=name,
- version=sic(version),
+ version=version,
  description=description,
  long_description=readme,
  author="Google LLC",