deleting unused variables from env.json

demo_scripts/simpleAKSCreate/env.json

@@ -1,11 +1,5 @@
 {
     "RESOURCE_GROUP_NAME": "myResourceGroup",
     "RESOURCE_LOCATION": "eastus",
-    "AKS_CLUSTER_NAME": "myAKSCluster",
-    "PUBLIC_IP_NAME": "myPublicIp",
-    "VNET_NAME": "myVnet",
-    "SUBNET_NAME": "mySubnet",
-    "APPLICATION_GATEWAY_NAME": "myApplicationGateway",
-    "APPGW_TO_AKS_PEERING_NAME": "AppGWtoAKSVnetPeering",
-    "AKS_TO_APPGW_PEERING_NAME": "AKStoAppGWVnetPeering"
+    "AKS_CLUSTER_NAME": "myAKSCluster"
 }