update setup.py, V0.2.3

Author: xinntao

VERSION

@@ -1 +1 @@
-0.2.1
+0.2.3

setup.py

@@ -43,12 +43,6 @@ def _minimal_ext_cmd(cmd):
 def get_hash():
     if os.path.exists('.git'):
         sha = get_git_hash()[:7]
-    elif os.path.exists(version_file):
-        try:
-            from gfpgan.version import __version__
-            sha = __version__.split('+')[-1]
-        except ImportError:
-            raise ImportError('Unable to get git version')
     else:
         sha = 'unknown'