feat(managedidentities)!: update the API

BREAKING CHANGE: This release has breaking changes.
#### managedidentities:v1alpha1
The following keys were deleted:
- schemas.Binding.properties.bindingId.description

discovery/managedidentities-v1alpha1.json

@@ -780,7 +780,7 @@
       }
     }
   },
-  "revision": "20201007",
+  "revision": "20201027",
   "rootUrl": "https://managedidentities.googleapis.com/",
   "schemas": {
     "AttachTrustRequest": {
@@ -798,7 +798,6 @@
       "id": "Binding",
       "properties": {
         "bindingId": {
-          "description": "A client-specified ID for this binding. Expected to be globally unique to support the internal bindings-by-ID API.",
           "type": "string"
         },
         "condition": {

src/apis/managedidentities/v1alpha1.ts

@@ -133,9 +133,6 @@ export namespace managedidentities_v1alpha1 {
    * Associates `members` with a `role`.
    */
   export interface Schema$Binding {
-    /**
-     * A client-specified ID for this binding. Expected to be globally unique to support the internal bindings-by-ID API.
-     */
     bindingId?: string | null;
     /**
      * The condition that is associated with this binding. If the condition evaluates to `true`, then this binding applies to the current request. If the condition evaluates to `false`, then this binding does not apply to the current request. However, a different role binding might grant the same role to one or more of the members in this binding. To learn which resources support conditions in their IAM policies, see the [IAM documentation](https://cloud.google.com/iam/help/conditions/resource-policies).