merge: drop an overwrite test

mercurial/merge.py

@@ -212,7 +212,7 b' def manifestmerge(repo, p1, p2, pa, over'
                 act("local moved to " + f2, "m",
                     f, f2, f, fmerge(f, f2, f2), False)
         elif f in ma and not n[20:]:
-            if n != ma[f] and not overwrite:
+            if n != ma[f]:
                 if repo.ui.prompt(
                     _(" local changed %s which remote deleted\n"
                       "use (c)hanged version or (d)elete?") % f,