localrepo: drop the CamelCase name for `localrepo.revlogfilestorage`

See 61557734c0ae for the reasoning.

mercurial/localrepo.py

@@ -1243,7 +1243,7 def makemain(**kwargs):
     return localrepository
 
 
-class RevlogFileStorage:
+class revlogfilestorage:  # (repository.ilocalrepositoryfilestorage)
     """File storage when using revlogs."""
 
     def file(self, path):
@@ -1258,15 +1258,6 class RevlogFileStorage:
         return filelog.filelog(self.svfs, path, try_split=try_split)
 
 
-revlogfilestorage = interfaceutil.implementer(
-    repository.ilocalrepositoryfilestorage
-)(RevlogFileStorage)
-
-if typing.TYPE_CHECKING:
-    # Help pytype by hiding the interface stuff that confuses it.
-    revlogfilestorage = RevlogFileStorage
-
-
 class RevlogNarrowFileStorage:
     """File storage when using revlogs and narrow files."""