util: kill Python 2.4 deque.remove hack

util: kill Python 2.4 deque.remove hack

--- a/mercurial/util.py	Thu May 14 17:38:38 2015 +0200
+++ b/mercurial/util.py	Sat May 16 09:03:21 2015 +0200
@@ -334,17 +334,7 @@
 
     return f
 
-try:
-    collections.deque.remove
-    deque = collections.deque
-except AttributeError:
-    # python 2.4 lacks deque.remove
-    class deque(collections.deque):
-        def remove(self, val):
-            for i, v in enumerate(self):
-                if v == val:
-                    del self[i]
-                    break
+deque = collections.deque
 
 class sortdict(dict):
     '''a simple sorted dictionary'''