Remove "built with" comment in setup.py upload

platform.dist() is deprecated and slated for removal in Python 3.8. The
upload command itself should also not be used to upload to PyPI, but
while it continues to exist it should not use deprecated functions.

Fixes bpo-35186

Author: pganssle

Lib/distutils/command/upload.py

@@ -121,14 +121,8 @@ def upload_file(self, command, pyversion, filename):
             'requires': meta.get_requires(),
             'obsoletes': meta.get_obsoletes(),
             }
-        comment = ''
-        if command == 'bdist_rpm':
-            dist, version, id = platform.dist()
-            if dist:
-                comment = 'built for %s %s' % (dist, version)
-        elif command == 'bdist_dumb':
-            comment = 'built for %s' % platform.platform(terse=1)
-        data['comment'] = comment
+
+        data['comment'] = ''
 
         if self.sign:
             data['gpg_signature'] = (os.path.basename(filename) + ".asc",