Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  37689c6efd58700ea7206abd3d39b71db317ed1c

allow removing non-existing sitelinks.

wbsitelinks should not report an error when trying to remove a link that isn't there.

Change-Id: I4d11fd89345191baf8ea4874d9fbf32e173bcf32