Bug 1643689 - disable 1st round of manifest scheduling. r=aryx

disable 1st round of manifest scheduling

Differential Revision: https://phabricator.services.mozilla.com/D85621

taskcluster/taskgraph/decision.py

@@ -75,7 +75,6 @@ PER_PROJECT_PARAMETERS = {
     'autoland': {
         'optimize_strategies': 'taskgraph.optimize:project.autoland',
         'target_tasks_method': 'autoland_tasks',
-        'test_manifest_loader': 'bugbug',  # Remove this line to disable "manifest scheduling".
     },
 
     'mozilla-central': {