Remove excess whitespace and unused imports.

setuptools/command/alias.py

-import distutils, os
-from setuptools import Command
-from distutils.util import convert_path
-from distutils import log
 from distutils.errors import *
 from setuptools.command.setopt import edit_config, option_base, config_file
 
@@ -77,6 +73,3 @@ def format_alias(name, aliases):
     else:
         source = '--filename=%r' % source
     return source+name+' '+command
-            
-
-