remove kernel version from patroni-pg-11

shared/gstg-gprd/main.tf

@@ -596,7 +596,6 @@ module "patroni-pg-11" {
   health_check           = "http"
   health_check_port      = "8009"
   ip_cidr_range          = "${var.subnetworks["postgres11"]}"
-  kernel_version         = "${var.default_kernel_version}"
   machine_type           = "${var.machine_types["patroni"]}"
   name                   = "postgres11"
   node_count             = "${var.node_count["postgres-11"]}"