title: Android Studio - warn: removing resource not found
body: <p>All of a sudden I'm receiving Android Studio errors when I try to build my app. It happend today in the morning when I started up my laptop, while yesterday it didn't. Android Studio says that I'm missing a <code>string resource</code> and 2 <code>drawables</code> which are nowhere to be found in my project nor used.</p>
  
  <p>The error:</p>
  
  <pre><code>Output:  warn: removing resource nl.coffeeit.inlite:string/status_bar_notification_info_overflow without required default value.
  C:\Users\Maffia\AndroidStudioProjects\In-Lite\android\app\build\intermediates\incremental\mergeDebugResources\merged.dir\values-v21\values-v21.xml:301: error: resource drawable/notification_action_background (aka nl.coffeeit.inlite:drawable/notification_action_background) not found.
  C:\Users\Maffia\AndroidStudioProjects\In-Lite\android\app\build\intermediates\incremental\mergeDebugResources\merged.dir\values-v21\values-v21.xml:306: error: resource dimen/notification_action_text_size (aka nl.coffeeit.inlite:dimen/notification_action_text_size) not found.
  error: failed linking references.
  
  Command: C:\Users\Maffia\.gradle\caches\transforms-1\files-1.1\aapt2-3.2.1-4818971-windows.jar\6c2b371e8419c4016ded3efc6f9ea641\aapt2-3.2.1-4818971-windows\aapt2.exe link -I\
          C:\Users\Maffia\AppData\Local\Android\Sdk\platforms\android-28\android.jar\
          --manifest\
          C:\Users\Maffia\AndroidStudioProjects\In-Lite\android\app\build\intermediates\split-apk\debug\resources\AndroidManifest.xml\
          -o\
          C:\Users\Maffia\AndroidStudioProjects\In-Lite\android\app\build\intermediates\processed_res\debug\processDebugResources\out\resources-debug.ap_\
          -R\
          @C:\Users\Maffia\AndroidStudioProjects\In-Lite\android\app\build\intermediates\incremental\processDebugResources\resources-list-for-resources-debug.ap_.txt\
          --auto-add-overlay\
          --java\
          C:\Users\Maffia\AndroidStudioProjects\In-Lite\android\app\build\generated\not_namespaced_r_class_sources\debug\processDebugResources\r\
          --custom-package\
          nl.coffeeit.inlite\
          -0\
          apk\
          --preferred-density\
          440dpi\
          --output-text-symbols\
          C:\Users\Maffia\AndroidStudioProjects\In-Lite\android\app\build\intermediates\symbols\debug\R.txt\
          --no-version-vectors
  Daemon:  AAPT2 aapt2-3.2.1-4818971-windows Daemon #0
  </code></pre>
  
  <p>I have no idea where those <code>resources</code> come from. I've tried multiple things to solve this issue:</p>
  
  <ul>
  <li>clean project</li>
  <li>rebuild project</li>
  <li>clear build directory</li>
  <li>invalidate caches/restart</li>
  <li>reviewed all my layout and string resources for errors</li>
  <li>restart my laptop</li>
  <li>even tried to revert to previous git commits, didn't work</li>
  <li>tried adding the specified string resource, still the two drawables
  popup as error</li>
  <li>re-created git project twice</li>
  </ul>
  
  <p>Does anyone know what could be wrong? I don't see it.</p>