feat(servicenetworking)!: update the API

BREAKING CHANGE: This release has breaking changes.

#### servicenetworking:v1
The following keys were deleted:
- schemas.AddSubnetworkRequest.properties.privateIpv6GoogleAccess.description
- schemas.AddSubnetworkRequest.properties.privateIpv6GoogleAccess.type

discovery/servicenetworking-v1.json

@@ -774,7 +774,7 @@
       }
     }
   },
-  "revision": "20200824",
+  "revision": "20201003",
   "rootUrl": "https://servicenetworking.googleapis.com/",
   "schemas": {
     "AddDnsRecordSetMetadata": {
@@ -901,10 +901,6 @@
           "format": "int32",
           "type": "integer"
         },
-        "privateIpv6GoogleAccess": {
-          "description": "Optional. The private IPv6 google access type for the VMs in this subnet. For information about the access types that can be set using this field, see [subnetwork](/compute/docs/reference/rest/v1/subnetworks) in the Compute API documentation.",
-          "type": "string"
-        },
         "region": {
           "description": "Required. The name of a [region](/compute/docs/regions-zones) for the subnet, such `europe-west1`.",
           "type": "string"

src/apis/servicenetworking/v1.ts

@@ -230,10 +230,6 @@ export namespace servicenetworking_v1 {
      * Required. The prefix length of the subnet's IP address range. Use CIDR range notation, such as `30` to provision a subnet with an `x.x.x.x/30` CIDR range. The IP address range is drawn from a pool of available ranges in the service consumer's allocated range.
      */
     ipPrefixLength?: number | null;
-    /**
-     * Optional. The private IPv6 google access type for the VMs in this subnet. For information about the access types that can be set using this field, see [subnetwork](/compute/docs/reference/rest/v1/subnetworks) in the Compute API documentation.
-     */
-    privateIpv6GoogleAccess?: string | null;
     /**
      * Required. The name of a [region](/compute/docs/regions-zones) for the subnet, such `europe-west1`.
      */
@@ -2388,7 +2384,6 @@ export namespace servicenetworking_v1 {
      *       //   "consumerNetwork": "my_consumerNetwork",
      *       //   "description": "my_description",
      *       //   "ipPrefixLength": 0,
-     *       //   "privateIpv6GoogleAccess": "my_privateIpv6GoogleAccess",
      *       //   "region": "my_region",
      *       //   "requestedAddress": "my_requestedAddress",
      *       //   "subnetwork": "my_subnetwork",