Revert "Bug 1783690 - part 4: Initialize git submodules in decision task"

This reverts commit c2b26663.

.taskcluster.yml

@@ -277,14 +277,10 @@ tasks:
                                       $if: 'tasks_for == "action"'
                                       then: >
                                           cd /builds/worker/checkouts/vcs &&
-                                          git submodule init &&
-                                          git submodule update &&
                                           ln -s /builds/worker/artifacts artifacts &&
                                           ~/.local/bin/taskgraph action-callback
                                       else: >
                                           cd /builds/worker/checkouts/vcs &&
-                                          git submodule init &&
-                                          git submodule update &&
                                           ln -s /builds/worker/artifacts artifacts &&
                                           ~/.local/bin/taskgraph decision
                                           --pushlog-id='0'