cmdutil: drop a duplicate import of crecord

It looks like this crept in with 69538481ea9f.

mercurial/cmdutil.py

@@ -16,7 +16,6 b' import bookmarks'
 import encoding
 import crecord as crecordmod
 import lock as lockmod
-import crecord as crecordmod
 
 def parsealiases(cmd):
     return cmd.lstrip("^").split("|")