Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  2e2a26d4e5b7730c5141374b58ced535f9380866

Remove unused message "flow-topic-count-sidebar"

According to Erik the key is related to the previous TOC attempt
which is being replaced.

Change-Id: I6e03d0d499983b526f76afc9648efd41ee382559