fix(@schematics/angular): remove empty i18n-extract target for new projects

The Angular CLI will default to using the correct builder for i18n extraction
if the target definition is not present in a project. This allows for a reduced
amount of preset configuration for new projects. The `i18n-extract` is only needed
when using the `@angular/localize` project and can be added when it is
used. Most options for the target are also command line oriented which makes
the target definition unused in many cases.

Author: clydin

packages/schematics/angular/application/index.ts

@@ -327,9 +327,6 @@ function addAppToWorkspaceFile(options: ApplicationOptions, appDir: string): Rul
           },
         },
       },
-      'extract-i18n': {
-        builder: Builders.BuildExtractI18n,
-      },
       test: options.minimal
         ? undefined
         : {