Revert "Revert "Revert "removing unused extension extensions/Translate"""

This reverts commit a2de7cad91dae98fe251f2e671e8ad24f66fa287.
Revert "Revert "Revert "removing unused extension Contest"""

This reverts commit bd08d6adbf8a317e29d2b719f24b09e53e691461.
Revert "Revert "Revert "removing unused extension extensions/CentralAuth"""

This reverts commit 51d7ea873a2b887a4667674e4685ec71e369553a.