Revert "Bug 1631839 - part 1: Expose new routes without project."

[JohanLorenzo]

Reverts #10092

#10092 broke the decision task with an error I've never seen before and I currently don't understand:

[task 2020-04-23T09:26:18.316Z] 2020-04-23 09:26:18,316 - INFO - Replaced 7 tasks by index-search during optimization.
[task 2020-04-23T09:26:18.318Z] Traceback (most recent call last):
[task 2020-04-23T09:26:18.319Z]   File "/builds/worker/.local/lib/python2.7/site-packages/taskgraph/main.py", line 480, in main
[task 2020-04-23T09:26:18.319Z]     args.command(vars(args))
[task 2020-04-23T09:26:18.320Z]   File "/builds/worker/.local/lib/python2.7/site-packages/taskgraph/main.py", line 320, in decision
[task 2020-04-23T09:26:18.320Z]     taskgraph_decision(options)
[task 2020-04-23T09:26:18.320Z]   File "/builds/worker/.local/lib/python2.7/site-packages/taskgraph/decision.py", line 109, in taskgraph_decision
[task 2020-04-23T09:26:18.321Z]     write_artifact('task-graph.json', tgg.morphed_task_graph.to_json())
[task 2020-04-23T09:26:18.321Z]   File "/builds/worker/.local/lib/python2.7/site-packages/taskgraph/generator.py", line 199, in morphed_task_graph
[task 2020-04-23T09:26:18.321Z]     return self._run_until('morphed_task_graph')
[task 2020-04-23T09:26:18.321Z]   File "/builds/worker/.local/lib/python2.7/site-packages/taskgraph/generator.py", line 338, in _run_until
[task 2020-04-23T09:26:18.322Z]     k, v = self._run.next()
[task 2020-04-23T09:26:18.322Z]   File "/builds/worker/.local/lib/python2.7/site-packages/taskgraph/generator.py", line 330, in _run
[task 2020-04-23T09:26:18.322Z]     optimized_task_graph, label_to_taskid, parameters, graph_config)
[task 2020-04-23T09:26:18.322Z]   File "/builds/worker/.local/lib/python2.7/site-packages/taskgraph/morph.py", line 246, in morph
[task 2020-04-23T09:26:18.323Z]     taskgraph, label_to_taskid = m(taskgraph, label_to_taskid, parameters, graph_config)
[task 2020-04-23T09:26:18.323Z]   File "/builds/worker/.local/lib/python2.7/site-packages/taskgraph/morph.py", line 159, in add_index_tasks
[task 2020-04-23T09:26:18.324Z]     added.append(make_index_task(task, taskgraph, label_to_taskid, parameters, graph_config))
[task 2020-04-23T09:26:18.324Z]   File "/builds/worker/.local/lib/python2.7/site-packages/taskgraph/morph.py", line 122, in make_index_task
[task 2020-04-23T09:26:18.324Z]     taskgraph, label_to_taskid, parameters, graph_config)
[task 2020-04-23T09:26:18.325Z]   File "/builds/worker/.local/lib/python2.7/site-packages/taskgraph/morph.py", line 59, in derive_misc_task
[task 2020-04-23T09:26:18.325Z]     image_taskid = label_to_taskid['build-docker-image-' + image]
[task 2020-04-23T09:26:18.325Z] KeyError: u'build-docker-image-index-task'

[JohanLorenzo]

Follow up: I know the root cause of this backout and it's documented at https://bugzilla.mozilla.org/show_bug.cgi?id=1632514