--- a/mercurial/discovery.py	Thu Mar 03 17:39:20 2022 -0800
+++ b/mercurial/discovery.py	Thu Mar 03 18:28:30 2022 -0800
@@ -237,7 +237,7 @@
 
     knownnode = cl.hasnode  # do not use nodemap until it is filtered
     # A. register remote heads of branches which are in outgoing set
-    for branch, heads in pycompat.iteritems(remotemap):
+    for branch, heads in remotemap.items():
         # don't add head info about branches which we don't have locally
         if branch not in branches:
             continue
@@ -261,14 +261,14 @@
         repo,
         (
             (branch, heads[1])
-            for branch, heads in pycompat.iteritems(headssum)
+            for branch, heads in headssum.items()
             if heads[0] is not None
         ),
     )
     newmap.update(repo, (ctx.rev() for ctx in missingctx))
-    for branch, newheads in pycompat.iteritems(newmap):
+    for branch, newheads in newmap.items():
         headssum[branch][1][:] = newheads
-    for branch, items in pycompat.iteritems(headssum):
+    for branch, items in headssum.items():
         for l in items:
             if l is not None:
                 l.sort()
@@ -379,9 +379,7 @@
         headssum = _oldheadssummary(repo, remoteheads, outgoing, inc)
     pushop.pushbranchmap = headssum
     newbranches = [
-        branch
-        for branch, heads in pycompat.iteritems(headssum)
-        if heads[0] is None
+        branch for branch, heads in headssum.items() if heads[0] is None
     ]
     # 1. Check for new branches on the remote.
     if newbranches and not newbranch:  # new branch requires --new-branch