Omit dereferenced static rest json file in stage builds (#22589)

* omit dereferenced static rest json file in stage builds

* there is no translations/de no more

* remove lines that no longer do anything

Author: Peter Bengtsson

.github/workflows/staging-build-pr.yml

@@ -101,12 +101,13 @@ jobs:
 
       - name: Delete heavy things we won't need deployed
         run: |
-          # Non-WIP translations we don't support yet.
-          rm -fr translations/de* translations/ru* translations/ko* translations/ru*
-
           # Not needed to run after having been built.
           rm -fr .next/cache
 
+          # The dereferenced file is not used in runtime once the
+          # decorated file has been created from it.
+          rm -fr lib/rest/static/dereferenced
+
       - name: Create an archive
         run: |
           tar -c --file=app.tar \