tests: drop a useless glob in test-infinite-bundlestore.t

With the previous breakage tamed, the lack of test output difference was causing
the test runner to report "no result code from test" because of this glob.

tests/test-infinitepush-bundlestore.t

@@ -281,7 +281,7 b' Non-fastforward scratch bookmark push'
   $ echo 1 > amend
   $ hg add amend
   $ hg ci --amend -m 'scratch amended commit'
-  saved backup bundle to $TESTTMP/client/.hg/strip-backup/6c10d49fe927-c99ffec5-amend.hg (glob)
+  saved backup bundle to $TESTTMP/client/.hg/strip-backup/6c10d49fe927-c99ffec5-amend.hg
   $ hg log -G -T '{desc} {phase} {bookmarks}'
   @  scratch amended commit draft scratch/mybranch
   |