Fix doubled --tag-build help display (backport from trunk)

--HG--
branch : setuptools-0.6
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/branches/setuptools-0.6%4050593

setuptools/command/egg_info.py

@@ -28,7 +28,6 @@ class egg_info(Command):
         ('no-svn-revision', 'R',
             "Don't add subversion revision ID [default]"),
         ('no-date', 'D', "Don't include date stamp [default]"),
-        ('tag-build=', 'b', "Specify explicit tag to add to version number"),
     ]
 
     boolean_options = ['tag-date', 'tag-svn-revision']
@@ -39,6 +38,7 @@ class egg_info(Command):
 
 
 
+
     def initialize_options (self):
         self.egg_name = None
         self.egg_version = None