diff --git a/etc/taskcluster/decision_task.py b/etc/taskcluster/decision_task.py
index c979e3e80d0..b2bb47d32a0 100644
--- a/etc/taskcluster/decision_task.py
+++ b/etc/taskcluster/decision_task.py
@@ -10,9 +10,6 @@ from decisionlib import CONFIG, SHARED
 
 
 def main(task_for):
-    if CONFIG.legacy_tc_deployment:  # pragma: no cover
-        return
-
     if CONFIG.git_ref.startswith("refs/heads/"):
         branch = CONFIG.git_ref[len("refs/heads/"):]
         CONFIG.treeherder_repository_name = "servo-" + (
@@ -165,9 +162,7 @@ windows_sparse_checkout = [
 def linux_tidy_unit_untrusted():
     return (
         decisionlib.DockerWorkerTask("Tidy + dev build + unit tests")
-        .with_worker_type(
-            "servo-docker-untrusted" if CONFIG.legacy_tc_deployment else "docker-untrusted"
-        )
+        .with_worker_type("docker-untrusted")
         .with_treeherder("Linux x64", "Tidy+Unit")
         .with_max_run_time_minutes(60)
         .with_dockerfile(dockerfile_path("build"))
@@ -755,14 +750,14 @@ def dockerfile_path(name):
 def linux_task(name):
     return (
         decisionlib.DockerWorkerTask(name)
-        .with_worker_type("servo-docker-worker" if CONFIG.legacy_tc_deployment else "docker")
+        .with_worker_type("docker")
         .with_treeherder_required()
     )
 
 
 def windows_task(name, worker_type=None):
     if worker_type is None:
-        worker_type = "servo-win2016" if CONFIG.legacy_tc_deployment else "win2016"
+        worker_type = "win2016"
     return (
         decisionlib.WindowsGenericWorkerTask(name)
         .with_worker_type(worker_type)
@@ -998,13 +993,9 @@ def magicleap_nightly():
 CONFIG.task_name_template = "Servo: %s"
 CONFIG.docker_images_expire_in = build_dependencies_artifacts_expire_in
 CONFIG.repacked_msi_files_expire_in = build_dependencies_artifacts_expire_in
-if CONFIG.legacy_tc_deployment:  # pragma: no cover
-    CONFIG.index_prefix = "project.servo.servo"
-    CONFIG.docker_image_build_worker_type = "servo-docker-worker"
-else:
-    CONFIG.index_prefix = "project.servo"
-    CONFIG.default_provisioner_id = "proj-servo"
-    CONFIG.docker_image_build_worker_type = "docker"
+CONFIG.index_prefix = "project.servo"
+CONFIG.default_provisioner_id = "proj-servo"
+CONFIG.docker_image_build_worker_type = "docker"
 
 
 if __name__ == "__main__":  # pragma: no cover
diff --git a/etc/taskcluster/decisionlib.py b/etc/taskcluster/decisionlib.py
index 96defe457d7..4d81a9b32e9 100644
--- a/etc/taskcluster/decisionlib.py
+++ b/etc/taskcluster/decisionlib.py
@@ -58,12 +58,7 @@ class Config:
         self.git_sha = os.environ.get("GIT_SHA")
 
         self.tc_root_url = os.environ.get("TASKCLUSTER_ROOT_URL")
-        self.legacy_tc_deployment = self.tc_root_url == "https://taskcluster.net"
-
-        if self.legacy_tc_deployment:  # pragma: no cover
-            self.default_provisioner_id = "aws-provisioner-v1"
-        else:
-            self.default_provisioner_id = "proj-example"
+        self.default_provisioner_id = "proj-example"
 
 
     def task_id(self):
@@ -620,10 +615,7 @@ class UnixTaskMixin(Task):
         """.format(n=n))
 
     def with_curl_artifact_script(self, task_id, artifact_name, out_directory=""):
-        if CONFIG.legacy_tc_deployment:  # pragma: no cover
-            queue_service = "https://queue.taskcluster.net"
-        else:
-            queue_service = CONFIG.tc_root_url + "/api/queue"
+        queue_service = CONFIG.tc_root_url + "/api/queue"
         return self \
         .with_dependencies(task_id) \
         .with_curl_script(