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1. First you MUST remove all references to that directory/component from your theme's  theme.module.ts file. 

   1. For example, to delete the "./app/login-page" directory, you'd want to find which component(s) use that directory in your theme.module.ts file. 

   2. If you search that file, you'd fine this reference:

      Code Block
      import { LoginPageComponent } from './app/login-page/login-page.component';

      
      

   3. That means you not only need to remove that "import" statement.  You'd also need to remove all other references to "LoginPageComponent" in that same theme.module.ts file. So, you'd also need to remove it from the DECLARATIONS section: 

      Code Block
      const DECLARATIONS = [   ....   LoginPageComponent,    LoginPageComponent, .... ];

      
      

2. Finally, delete the directory in question from your theme.
3. At this point, you should rebuild your theme to verify nothing has broken.  If you did everything correctly, no errors will occur.
   1. If you failed to edit your theme.module.ts correctly, you may see "Cannot find module [path-to-module]" errors which reference the directories that Angular/Node can no longer find in your theme.  Either restore those directories, or remove the reference(s) from the theme.module.ts similar to step 1 above.

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