build: do not pass mode option to test-v8 command
It was removed upstream and is now inferred from the build config.
Refs: https://github.com/nodejs/node-v8/issues/180#issuecomment-711883431
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
It was removed upstream and is now inferred from the build config.
Refs: https://github.com/nodejs/node-v8/issues/180#issuecomment-711883431