message: fix(webhooks): remove unuse field
diff: @@ -29,7 +29,6 @@ extend type Mutation {
  type WebhookCollection {
  totalCount: Int
  - cursor: String
  items: [Webhook]
  }
  @@ -63,7 +62,6 @@ input WebhookUpdateInput {
  type WebhookEventCollection{
  totalCount: Int
  - cursor: String
  items: [WebhookEvent]
  }
  