src/vs/platform/extensionManagement/node/extensionsScanner.ts/ExtensionsScanner/removeUninstalledExtension
class ExtensionsScanner:	async removeUninstalledExtension(extension: ILocalExtension | IScannedExtension): Promise<void> {
		await this.removeExtension(extension, 'uninstalled');
		await this.withUninstalledExtensions(uninstalled => delete uninstalled[ExtensionKey.create(extension).toString()]);
	}