activationEvents completion list includes unused onIdentity entry

[gjsjohnmurray]

vscode/src/vs/workbench/services/extensions/common/extensionsRegistry.ts

Lines 322 to 326 in f09c412

	{
	label: 'onIdentity',
	body: 'onIdentity:${8:identity}',
	description: nls.localize('vscode.extension.activationEvents.onIdentity', 'An activation event emitted whenever the specified user identity.'),
	},

This was apparently added by @sandy081 but I haven't found anywhere in the codebase that uses it.

[gjsjohnmurray]

/assign @sandy081