Run a decision task on both deployments for push events

.taskcluster.yml

@@ -48,18 +48,7 @@ tasks:
             $if: "event.ref[:11] == 'refs/heads/'"
             then: "${event.ref[11:]}"
         in:
-          $if: >-
+          $if: "branch in ['auto', 'try', 'master'] || branch[:4] == 'try-'"
-            (
-              taskcluster_root_url == 'https://community-tc.services.mozilla.com' &&
-              branch == 'try-communitytc'
-            ) || (
-              taskcluster_root_url == 'https://taskcluster.net' &&
-              branch != 'try-communitytc' &&
-              (
-                branch in ['auto', 'try', 'master'] ||
-                branch[:4] == 'try-'
-              )
-            )
           then:
             $mergeDeep:
               - {$eval: "task_common"}

etc/taskcluster/decision_task.py

@@ -24,6 +24,10 @@ def main(task_for):
     magicleap_nightly = lambda: None
 
     if task_for == "github-push":
+        if not CONFIG.legacy_tc_deployment:  # pragma: no cover
+            # Do nothing (other than the decision task itsef) on community-tc by default for now
+            return
+
         # FIXME https://github.com/servo/servo/issues/22187
         # In-emulator testing is disabled for now. (Instead we only compile.)
         # This local variable shadows the module-level function of the same name.