ci: Remove path limitation of js60 check

The check is supposed to run for all merge requests that touch javascript
files, but for some reason I see it's skipped quite often. Better have
the test run unnecessarily some times than let bugs through, so remove
the limitation.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/647

.gitlab-ci.yml

@@ -30,9 +30,6 @@ js_check:
         - find js -name '*.js' -exec js60 -c -s '{}' ';' 2>&1 | tee $JS_LOG
         - (! grep -q . $JS_LOG)
     <<: *only_default
-    only:
-        changes:
-            - js/**/*
     artifacts:
         paths:
             - ${JS_LOG}