Revert "Merge pull request #703 from Wikia/backlink-query"

This reverts commit 06f815858f9facb33e69375fd7bbc4da956be96b, reversing
changes made to 50dce0a220add5d0fafe97363fba87b45f9f08f7.
Merge pull request #762 from Wikia/revert-nested-queries

Revert "Merge pull request #703 from Wikia/backlink-query"