Remove optional params

src/vs/workbench/contrib/terminal/common/terminalEnvironment.ts

@@ -119,7 +119,7 @@ function _getLangEnvVariable(locale?: string) {
 	return parts.join('_') + '.UTF-8';
 }
 
-export function getCwd(shell: IShellLaunchConfig, userHome: string, lastActiveWorkspace: IWorkspaceFolder | undefined, configurationResolverService: IConfigurationResolverService | undefined, root?: Uri, customCwd?: string): string {
+export function getCwd(shell: IShellLaunchConfig, userHome: string, lastActiveWorkspace: IWorkspaceFolder | undefined, configurationResolverService: IConfigurationResolverService | undefined, root: Uri | undefined, customCwd: string | undefined): string {
 	if (shell.cwd) {
 		return (typeof shell.cwd === 'object') ? shell.cwd.fsPath : shell.cwd;
 	}