title: Android Studio: Cannot call .remove() on TreeMap while using API level 23 (requires 24)
body: <p>I'm using a TreeMap on API level 23 and I would like to remove an element from it but I'm getting an error.   </p>
  
  <p>"Call requires API level 24 (current min is 23): java.util.Map#remove"</p>
  
  <p>Any ideas?</p>