Remove irrelevant Opera flag data for api.MediaDevices.getDisplayMedia (#9918)
Remove irrelevant Opera flag data for api.MediaDevices.getDisplayMedia (#9918)

This PR removes irrelevant flag data for Opera and Opera Android for the `getDisplayMedia` member of the `MediaDevices` API as per the corresponding [data guidelines](https://github.com/mdn/browser-compat-data/blob/main/docs/data-guidelines.md#removal-of-irrelevant-flag-data).

This PR was created from results of a [script](https://github.com/vinyldarkscratch/browser-compat-data/blob/scripts/remove-redundant-flags/scripts/remove-redundant-flags.js) designed to remove irrelevant flags.
mdn/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data