fix(@schematics/angular): the ng-new schematic should not prompt for style

closes #13383

Author: ahasall

packages/schematics/angular/application/index.ts

@@ -307,6 +307,7 @@ export default function (options: ApplicationOptions): Rule {
     }
     validateProjectName(options.name);
     options.prefix = options.prefix || 'app';
+    options.style = options.style || Style.Css;
     const appRootSelector = `${options.prefix}-root`;
     const componentOptions: Partial<ComponentOptions> = !options.minimal ?
       {

packages/schematics/angular/ng-new/schema.json

@@ -112,31 +112,7 @@
     "style": {
       "description": "The file extension or preprocessor to use for style files.",
       "type": "string",
-      "default": "css",
       "enum": ["css", "scss", "sass", "less", "styl"],
-      "x-prompt": {
-        "message": "Which stylesheet format would you like to use?",
-        "type": "list",
-        "items": [
-          { "value": "css", "label": "CSS" },
-          {
-            "value": "scss",
-            "label": "SCSS   [ https://sass-lang.com/documentation/syntax#scss                ]"
-          },
-          {
-            "value": "sass",
-            "label": "Sass   [ https://sass-lang.com/documentation/syntax#the-indented-syntax ]"
-          },
-          {
-            "value": "less",
-            "label": "Less   [ http://lesscss.org                                             ]"
-          },
-          {
-            "value": "styl",
-            "label": "Stylus [ http://stylus-lang.com                                         ]"
-          }
-        ]
-      },
       "x-user-analytics": 5
     },
     "skipTests": {