chore: stop showing new curriculum by default (#55660)

.github/workflows/node.js-tests.yml

@@ -55,8 +55,6 @@ jobs:
       - name: Set Environment variables
         run: |
           cp sample.env .env
-          echo 'SHOW_NEW_CURRICULUM=true' >> .env
-          echo 'BUILD_WITH_SUBMODULE=true' >> .env
           cat .env
         # TODO: Remove this ^ after migration is complete
 

.github/workflows/temporary-container-checks.yml

@@ -45,7 +45,7 @@ jobs:
             --build-arg PATREON_CLIENT_ID=id_from_patreon_dashboard \
             --build-arg DEPLOYMENT_ENV=staging \
             --build-arg SHOW_UPCOMING_CHANGES=false \
-            --build-arg SHOW_NEW_CURRICULUM=true \
+            --build-arg SHOW_NEW_CURRICULUM=false \
             --build-arg GROWTHBOOK_URI=api_URI_from_Growthbook_dashboard \
             --build-arg FREECODECAMP_NODE_ENV=development \
             -t fcc-client \