feat: remove meteor build cache variable, it was not the cause of the problem

includes/cache.yml

@@ -16,7 +16,7 @@
 .cache-app-build-meteor:
   cache:
     - !reference [.cache-node-modules, cache]
-    - key: $METEOR_BUILD_CACHE_KEY
+    - key: meteor-build-cache
       policy: pull-push
       paths:
         - $APP_DIR/.meteor/local/resolver-result-cache.json

meteor-kubernetes.yml

@@ -4,7 +4,6 @@ variables:
   DEFAULT_VALUE_application_command: node main.js
   # higher default memory
   DEFAULT_VALUE_application_resources_requests_memory: "350Mi"
-  METEOR_BUILD_CACHE_KEY: meteor-build-cache # some project seem to have trouble with caching meteor, there, we can use the commit as cache key or so to effectivly disable it
 
 app-build:
   extends: