match: remove match.never

Only one user, can be translated to match.exact()

hgext/acl.py

@@ -61,7 +61,7 b' def buildmatch(ui, repo, user, key):'
              (key, len(pats), user))
     if pats:
         return match.match(repo.root, '', pats)
-    return match.never(repo.root, '')
+    return match.exact(repo.root, '', [])
 
 
 def hook(ui, repo, hooktype, node=None, source=None, **kwargs):

mercurial/match.py

@@ -106,10 +106,6 b' class always(match):'
     def __init__(self, root, cwd):
         match.__init__(self, root, cwd, [])
 
-class never(match):
-    def __init__(self, root, cwd):
-        match.__init__(self, root, cwd, [], exact = True)
-
 def patkind(pat):
     return _patsplit(pat, None)[0]