chore: clean up unused var in readme (terraform-google-modules#1368)

* Cleaning Up readme for example to remove filestore_csi_drive and enable_autopilot * Correction to build process and reverting csi changes Co-authored-by: Akshay Bathija <akshaybathija@google.com>

Author: akshaybathija-github

autogen/main/README.md

@@ -88,9 +88,6 @@ module "gke" {
  cloudrun = true
  dns_cache = false
  {% endif %}
- {% if autopilot_cluster %}
- enable_autopilot = true
- {% endif %}
 
 {% if autopilot_cluster != true %}
  node_pools = [

modules/beta-autopilot-private-cluster/README.md

@@ -50,7 +50,6 @@ module "gke" {
  enable_private_endpoint = true
  enable_private_nodes = true
  master_ipv4_cidr_block = "10.0.0.0/28"
- enable_autopilot = true
 
 }
 ```

modules/beta-autopilot-public-cluster/README.md

@@ -44,7 +44,6 @@ module "gke" {
  ip_range_services = "us-central1-01-gke-01-services"
  horizontal_pod_autoscaling = true
  filestore_csi_driver = false
- enable_autopilot = true
 
 }
 ```