Bug 1657649 - [ci] Remove the SETA shadow-scheduler, r=jmaher

Differential Revision: https://phabricator.services.mozilla.com/D86250

taskcluster/ci/source-test/shadow-scheduler.yml

@@ -154,14 +154,3 @@ bugbug_reduced_high:
     worker:
         env:
             TASKGRAPH_OPTIMIZE_STRATEGIES: taskgraph.optimize:experimental.bugbug_reduced_high
-
-seta:
-    description: Runs the SETA optimization strategy instead of the default.
-    treeherder:
-        symbol: SS(seta)
-    index:
-        product: source
-        job-name: shadow-scheduler-seta
-    worker:
-        env:
-            TASKGRAPH_OPTIMIZE_STRATEGIES: taskgraph.optimize:experimental.seta

taskcluster/taskgraph/optimize/__init__.py

@@ -568,12 +568,6 @@ class experimental(object):
     }
     """Runs task containing tests in the same directories as modified files."""
 
-    seta = {
-        'test': Any('skip-unless-schedules', 'seta'),
-    }
-    """Provides a stable history of SETA's performance in the event we make it
-    non-default in the future. Only useful as a benchmark."""
-
 
 class ExperimentalOverride(object):
     """Overrides dictionaries that are stored in a container with new values.

tools/tryselect/test/test_auto.py

@@ -12,11 +12,11 @@ from tryselect.selectors.auto import AutoParser
 
 def test_strategy_validation():
     parser = AutoParser()
-    args = parser.parse_args(["--strategy", "seta"])
-    assert args.strategy == "taskgraph.optimize:tryselect.seta"
+    args = parser.parse_args(["--strategy", "relevant_tests"])
+    assert args.strategy == "taskgraph.optimize:tryselect.relevant_tests"
 
-    args = parser.parse_args(["--strategy", "taskgraph.optimize:experimental.seta"])
-    assert args.strategy == "taskgraph.optimize:experimental.seta"
+    args = parser.parse_args(["--strategy", "taskgraph.optimize:experimental.relevant_tests"])
+    assert args.strategy == "taskgraph.optimize:experimental.relevant_tests"
 
     with pytest.raises(SystemExit):
         parser.parse_args(["--strategy", "taskgraph.optimize:tryselect"])