Revert "added MessageOverrides: a replacement for DefaultMessages aka messaging.wikia.com CE-271"

This reverts commit 5922ba0bbe791d7f5ed2368e2af9e99c3024c2be.
Revert "DAR-3292 | Fixed global nav messages"

This reverts commit 489eb3b838f72b0b81a293c2c06f90c2c7545757.

Reverts #2434
Merge pull request #2438 from Wikia/release-204-reverts

Release 204 reverts