perf: quiet stdout output in perf::unbundle

There a lot of repetitive bundle application message we do not care about.

contrib/perf.py

@@ -2670,6 +2670,7 b' def perf_unbundle(ui, repo, fname, **opt'
         bundle = [None, None]
         orig_quiet = repo.ui.quiet
         try:
+            repo.ui.quiet = True
             with open(fname, mode="rb") as f:
 
                 def noop_report(*args, **kwargs):
@@ -2699,6 +2700,7 b' def perf_unbundle(ui, repo, fname, **opt'
                 timer(apply, setup=setup)
                 fm.end()
         finally:
+            repo.ui.quiet == orig_quiet
             gen, tr = bundle
             if tr is not None:
                 tr.abort()

tests/test-contrib-perf.t

@@ -395,9 +395,6 b' Test pre-run feature'
   $ hg bundle --exact --rev 'last(all(), 5)' last-5.hg
   4 changesets found
   $ hg perf::unbundle last-5.hg
-  adding changesets
-  adding manifests
-  adding file changes
 
 
 test  profile-benchmark option