[mey]

Long press on the notification. Disable app notifications. Granted this is blunt force and is a bandaid on the bigger problem.

Alternative is to Disable the preloaded app.

[ohazi]

He mentioned this in the letter as being overkill. He is asking for a preference to disable the notifications that a reasonable person would consider advertising, so that (e.g.) he can continue to get notifications about friends photo albums.

[tacomonstrous]

Or turn off notifications just for the Assistant channel, which is most likely where this is coming from.

[corndoge]

Best is root and remove