Backed out changeset 4d416c08d583 (bug 1853091) bug 1853874 fixed the actual underlying issue.

taskcluster/ci/diffoscope/artifacts.yml

@@ -7,7 +7,7 @@ job-defaults:
     fail-on-diff: true
     pre-diff-commands:
         # jogfile.json is only created in artifact builds.
-        - rm -f b/"$RESOURCE_DIR"/jogfile.json
+        - rm b/"$RESOURCE_DIR"/jogfile.json
         # Remove noise from differences in line numbers in preprocessor output
         # due to #if/#else branches.
         - sed -i '/^\/\/@line /d' {a,b}/"$RESOURCE_DIR"/browser/defaults/preferences/firefox.js