Bug 1899142 - don't show android-components dummy tasks on treeherder. r=aryx,releng-reviewers,bhearsum

These tasks will never fail, and don't have logs, so having them on
treeherder can be confusing.

Rename `post-signing` to `post-signing-dummy` to benefit from the
special handling in `verify_dependency_tiers`.

Differential Revision: https://phabricator.services.mozilla.com/D211746

taskcluster/android_taskgraph/transforms/post_dummy.py

@@ -4,7 +4,6 @@
 
 
 from taskgraph.transforms.base import TransformSequence
-from taskgraph.util.schema import resolve_keyed_by
 
 transforms = TransformSequence()
 
@@ -15,17 +14,3 @@ def set_name_and_clear_artifacts(config, tasks):
         task["name"] = task["attributes"]["build-type"]
         task["attributes"]["artifacts"] = {}
         yield task
-
-
-@transforms.add
-def resolve_keys(config, tasks):
-    for task in tasks:
-        resolve_keyed_by(
-            task,
-            "treeherder.symbol",
-            item_name=task["name"],
-            **{
-                "build-type": task["attributes"]["build-type"],
-            }
-        )
-        yield task

taskcluster/docs/kinds.rst

@@ -855,8 +855,8 @@ android-startup-test
 --------------------
 Startup test for android.
 
-post-signing
-------------
+post-signing-dummy
+------------------
 Gating kind to wait for all android signing tasks.
 
 beetmover-components

taskcluster/kinds/beetmover-components/kind.yml

@@ -14,7 +14,7 @@ transforms:
 kind-dependencies:
     - signing
     - build-components
-    - post-signing
+    - post-signing-dummy
 
 jobs:
     push-to-maven:

taskcluster/kinds/post-beetmover-components-dummy/kind.yml

@@ -23,13 +23,3 @@ jobs:
         attributes:
             component: all
         worker-type: succeed
-        treeherder:
-            kind: build
-            platform: AC-android-all/opt
-            symbol:
-                by-build-type:
-                    release: post-beetmover-release
-                    beta: post-beetmover-beta
-                    nightly: post-beetmover-nightly
-                    default: post-beetmover
-            tier: 1

taskcluster/kinds/post-signing-dummy/kind.yml

@@ -14,7 +14,7 @@ kind-dependencies:
     - signing
 
 jobs:
-    post-signing:
+    post-signing-dummy:
         description: Dummy task to wait on all builds before publishing them
         from-deps:
             group-by: build-type
@@ -23,14 +23,3 @@ jobs:
         attributes:
             component: all
         worker-type: succeed
-        worker: {}
-        treeherder:
-            kind: build
-            platform: AC-android-all/opt
-            symbol:
-                by-build-type:
-                    release: post-signing-release
-                    beta: post-signing-beta
-                    nightly: post-signing-nightly
-                    default: post-signing
-            tier: 1