No bug: Don't include push-id in treeherder routes; r=aki

Treeherder ignores this.

Differential Revision: https://phabricator.services.mozilla.com/D82251

.taskcluster.yml

@@ -117,7 +117,7 @@ tasks:
 
               routes:
                   $flattenDeep:
-                      - "tc-treeherder.v2.${repository.project}.${push.revision}.${push.pushlog_id}"
+                      - "tc-treeherder.v2.${repository.project}.${push.revision}"
                       - $if: 'tasks_for == "hg-push"'
                         then:
                             - "index.${trustDomain}.v2.${repository.project}.latest.taskgraph.decision"

taskcluster/taskgraph/transforms/task.py

@@ -1800,10 +1800,9 @@ def build_task(config, tasks):
             branch_rev = get_branch_rev(config)
 
             routes.append(
-                '{}.v2.{}.{}.{}'.format(TREEHERDER_ROUTE_ROOT,
-                                        config.params['project'],
-                                        branch_rev,
-                                        config.params['pushlog_id'])
+                "{}.v2.{}.{}".format(
+                    TREEHERDER_ROUTE_ROOT, config.params["project"], branch_rev,
+                )
             )
 
         if 'expires-after' not in task: