Remove backticks from other code comment to avoid linter error

See https://github.com/python/cpython/actions/runs/5765303505/job/15631004596?pr=107613.
This was missed and should have been included in the previous commit.

Author: shailshouryya

Doc/library/collections.rst

@@ -1261,7 +1261,7 @@ variants of :func:`functools.lru_cache`:
                 # no longer need to keep track of how many times this
                 # entry has been seen; in a single-threaded environment,
                 # the self.requests OrderedDict will always contain the value
-                # being removed, but use `pop(args, None)` to reduce
+                # being removed, but use pop(args, None) to reduce
                 # complications in a multi-threaded environment where
                 # a race condition may cause an exception
                 self.requests.pop(args, None)