[Maps] Remove maps-telemetry SO registration

[afharo]

Maps added a temporary workaround to be able to remove the maps-telemetry SOs while #67086 was completed:

kibana/x-pack/plugins/maps/server/saved_objects/setup_saved_objects.ts

Lines 60 to 75 in 3730dd0

	/*
	* The maps-telemetry saved object type isn't used, but in order to remove these fields from
	* the mappings we register this type with `type: 'object', enabled: true` to remove all
	* previous fields from the mappings until https://github.com/elastic/kibana/issues/67086 is
	* solved.
	*/
	core.savedObjects.registerType({
	name: 'maps-telemetry',
	hidden: false,
	namespaceType: 'agnostic',
	mappings: {
	// @ts-ignore Core types don't support this since it's only really valid when removing a previously registered type
	type: 'object',
	enabled: false,
	},
	});

Since the referred issue is already complete. We should remove this bit.

Additional context: we may also want to remove it from 7.17: https://github.com/elastic/kibana/blob/7.17/x-pack/plugins/maps/server/saved_objects/maps_telemetry.ts

[elasticmachine]

Pinging @elastic/kibana-gis (Team:Geo)

[elasticmachine]

Pinging @elastic/kibana-presentation (Team:Presentation)

[nreese]

Resolved in #149102

[nreese]

closing, #149102 has merged.