src/vs/platform/extensionManagement/node/extensionsScanner.ts/ExtensionsScanner/removeUninstalledExtension
class ExtensionsScanner:	async removeUninstalledExtension(extension: ILocalExtension): Promise<void> {
		await this.removeExtension(extension, 'uninstalled');
		await this.withUninstalledExtensions(uninstalled => delete uninstalled[new ExtensionIdentifierWithVersion(extension.identifier, extension.manifest.version).key()]);
	}