Revert "Add local interwiki for metawiki"

Breaks things, see some test cases at
<https://meta.wikimedia.org/?oldid=7493717>

This reverts commit f7bdb7a48cc91c81e61cd9985de216d7bf90c047.

Change-Id: I73b93d34779612384d74a22292647ad89d29d46d