Remove hardcoded gcp-beta

The use of google-beta was added to accommodate network_profile at the time.  It's now GA and the hard-coded beta provider causes the return of URL for nework_profile  "https://www.googleapis.com/compute/beta/projects/......."
when the actual infra is 
"networkProfile: https://www.googleapis.com/compute/v1/projects" ( from gcloud compute networks describe <network>  )

Author: mkhtse

modules/vpc/main.tf

@@ -18,7 +18,6 @@
 	VPC configuration
  *****************************************/
 resource "google_compute_network" "network" {
-  provider                                  = google-beta
   name                                      = var.network_name
   auto_create_subnetworks                   = var.auto_create_subnetworks
   routing_mode                              = var.routing_mode