Clean up some of the extensions (#8267)

* 💄

* prune unused code

* more cleanup

* remove abunch of used code

extensions/mssql/src/prompts/question.ts

@@ -3,15 +3,12 @@
  *  Licensed under the Source EULA. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-import vscode = require('vscode');
+import * as vscode from 'vscode';
 
 export class QuestionTypes {
 	public static get input(): string { return 'input'; }
 	public static get password(): string { return 'password'; }
-	public static get list(): string { return 'list'; }
 	public static get confirm(): string { return 'confirm'; }
-	public static get checkbox(): string { return 'checkbox'; }
-	public static get expand(): string { return 'expand'; }
 }
 
 // Question interface to clarify how to use the prompt feature
@@ -40,19 +37,11 @@ export interface IQuestion {
 }
 
 // Pair used to display simple choices to the user
-export interface INameValueChoice {
+interface INameValueChoice {
 	name: string;
 	value: any;
 }
 
-// Generic object that can be used to define a set of questions and handle the result
-export interface IQuestionHandler {
-	// Set of questions to be answered
-	questions: IQuestion[];
-	// Optional callback, since questions may handle themselves
-	callback?: IPromptCallback;
-}
-
 export interface IPrompter {
 	promptSingle<T>(question: IQuestion, ignoreFocusOut?: boolean): Promise<T>;
 	/**
@@ -61,10 +50,5 @@ export interface IPrompter {
 	 * @returns Map of question IDs to results, or undefined if
 	 * the user canceled the question session
 	 */
-	prompt<T>(questions: IQuestion[], ignoreFocusOut?: boolean): Promise<{ [questionId: string]: any }>;
-	promptCallback(questions: IQuestion[], callback: IPromptCallback): void;
-}
-
-export interface IPromptCallback {
-	(answers: { [id: string]: any }): void;
+	prompt(questions: IQuestion[], ignoreFocusOut?: boolean): Promise<{ [questionId: string]: any }>;
 }