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

See 61557734c0ae for the reasoning.

mercurial/localrepo.py

@@ -260,7 +260,7 moderncaps = {
 legacycaps = moderncaps.union({b'changegroupsubset'})
 
 
-class LocalCommandExecutor:
+class localcommandexecutor:  # (repository.ipeercommandexecutor)
     def __init__(self, peer):
         self._peer = peer
         self._sent = False
@@ -305,15 +305,6 class LocalCommandExecutor:
         self._closed = True
 
 
-localcommandexecutor = interfaceutil.implementer(
-    repository.ipeercommandexecutor
-)(LocalCommandExecutor)
-
-if typing.TYPE_CHECKING:
-    # Help pytype by hiding the interface stuff that confuses it.
-    localcommandexecutor = LocalCommandExecutor
-
-
 class LocalPeer(repository.peer):
     '''peer for a local repo; reflects only the most recent API'''