message: remove redundant postMessage overriding
diff: ]
  }
  },
  - "BroadcastChannel": {
  - "name": "BroadcastChannel",
  - "methods": {
  - "method": {
  - "postMessage": {
  - "name": "postMessage",
  - "override-signatures": [
  - "postMessage(message: any): void"
  - ]
  - }
  - }
  - }
  - },
  "MessagePort": {
  "name": "MessagePort",
  "methods": {
  