Remove default value of env 'APP_PORT' (#896)

As oc-new-app action now has 'port' as an optional input
So, removing default value of env 'APP_PORT'

Signed-off-by: divyansh42 <diagrawa@redhat.com>

ci/openshift.yml

@@ -45,8 +45,9 @@ env:
   OPENSHIFT_SERVER: ${{ secrets.OPENSHIFT_SERVER }}
   OPENSHIFT_TOKEN: ${{ secrets.OPENSHIFT_TOKEN }}
 
-  # ⬇️ EDIT with the port your application should be accessible on.
-  APP_PORT: 8080
+  # ⬇️ EDIT with any additional port your application should expose.
+  # By default, oc new-app action creates a service to the image's lowest numeric exposed port.
+  APP_PORT: ""
 
   # ⬇️ EDIT if you wish to set the kube context's namespace after login. Leave blank to use the default namespace.
   OPENSHIFT_NAMESPACE: ""