Update issue labelling automation

Don't label A-Threads with Z-Labs any more because threads have been released

Author: kittykat

.github/workflows/triage-move-labelled.yml

@@ -11,7 +11,6 @@ jobs:
     if: >
         contains(github.event.issue.labels.*.name, 'A-Maths') || 
         contains(github.event.issue.labels.*.name, 'A-Message-Pinning') ||
-        contains(github.event.issue.labels.*.name, 'A-Threads') ||
         contains(github.event.issue.labels.*.name, 'A-Polls') ||
         contains(github.event.issue.labels.*.name, 'A-Location-Sharing') ||
         contains(github.event.issue.labels.*.name, 'A-Message-Bubbles') ||