Remove Translate extension repository from translatewiki channel
Remove Translate extension repository from translatewiki channel

Trying to narrow the channel focus just on translatewiki related things.
Also trying to reduce "botspam" given the increased levels of chatting.

Change-Id: I655a4c16c3f5adc0a674fe2cc50e6c8792bab701
Reviewed-on: https://gerrit.wikimedia.org/r/c/labs/tools/wikibugs2/+/758321
Reviewed-by: Majavah <c22b5f9178342609428d6f51b2c5af4c0bde6a42@taavi.wtf>
Tested-by: jenkins-bot

wikimedia/labs-tools-wikibugs2,wikimedia/labs-tools-wikibugs2