AppDataDocumentProvider: Allow to remove documents (#744)

* AppDataDocumentProvider: Allow to remove documents

* Typo

src/pandroid/app/src/main/java/com/panda3ds/pandroid/app/provider/AppDataDocumentProvider.java

@@ -158,6 +158,11 @@ public class AppDataDocumentProvider extends DocumentsProvider {
         }
     }
 
+    @Override
+    public void removeDocument(String documentId, String parentDocumentId) throws FileNotFoundException {
+        deleteDocument(documentId);
+    }
+
     @Override
     public ParcelFileDescriptor openDocument(String documentId, String mode, @Nullable CancellationSignal signal) throws FileNotFoundException {
         return ParcelFileDescriptor.open(obtainFile(documentId), ParcelFileDescriptor.parseMode(mode));