mergestate: make some callers not pass pointless node argument

The node argument is set on the created `mergestate` instance, but
these callers don't even look at that instance.

Differential Revision: https://phab.mercurial-scm.org/D9031

hgext/strip.py

@@ -269,7 +269,7 b' def stripcmd(ui, repo, *revs, **opts):'
             repo.dirstate.write(repo.currenttransaction())
 
             # clear resolve state
-            mergestatemod.mergestate.clean(repo, repo[b'.'].node())
+            mergestatemod.mergestate.clean(repo)
 
             update = False
 

mercurial/localrepo.py

@@ -2516,7 +2516,7 b' class localrepository(object):'
                 ui.status(
                     _(b'working directory now based on revision %d\n') % parents
                 )
-            mergestatemod.mergestate.clean(self, self[b'.'].node())
+            mergestatemod.mergestate.clean(self)
 
         # TODO: if we know which new heads may result from this rollback, pass
         # them to destroy(), which will prevent the branchhead cache from being