PEER-242: Update actions script

Signed-off-by: SeeuSim <[email protected]>

Author: SeeuSim

.github/workflows/build-deploy-docker.yaml

@@ -11,7 +11,6 @@ on:
       - main
 
 env:
-  IS_GKE_CLUSTER_UP: true
   DOCKER_REGISTRY_USN: ay2425s1cs3219g16
   USER_EXPRESS_PORT: 9001
   QUESTION_EXPRESS_PORT: 9002