clean up bogus mimetype values in content_mimetype table
As the indexer will use another tool to index, the current bogus values won't be updated. So they should be cleaned up.
Migrated from T854 (view on Phabricator)
As the indexer will use another tool to index, the current bogus values won't be updated. So they should be cleaned up.
Migrated from T854 (view on Phabricator)