chore: fix documentation (#516)

modules/shared_vpc/README.md

@@ -60,7 +60,6 @@ module "service-project" {
 | random\_project\_id | Adds a suffix of 4 random characters to the `project_id` | `bool` | `false` | no |
 | sa\_role | A role to give the default Service Account for the project (defaults to none) | `string` | `""` | no |
 | shared\_vpc | The ID of the host project which hosts the shared VPC | `string` | `""` | no |
-| shared\_vpc\_enabled | If shared VPC should be used | `bool` | `false` | no |
 | shared\_vpc\_subnets | List of subnets fully qualified subnet IDs (ie. projects/$project\_id/regions/$region/subnetworks/$subnet\_id) | `list(string)` | `[]` | no |
 | usage\_bucket\_name | Name of a GCS bucket to store GCE usage reports in (optional) | `string` | `""` | no |
 | usage\_bucket\_prefix | Prefix in the GCS bucket to store GCE usage reports in (optional) | `string` | `""` | no |