remove unused HookActvity

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

src/main/java/com/nextcloud/client/di/ComponentsModule.java

@@ -33,7 +33,6 @@ import com.owncloud.android.ui.activity.FileDisplayActivity;
 import com.owncloud.android.ui.activity.FilePickerActivity;
 import com.owncloud.android.ui.activity.FirstRunActivity;
 import com.owncloud.android.ui.activity.FolderPickerActivity;
-import com.owncloud.android.ui.activity.HookActivity;
 import com.owncloud.android.ui.activity.LogHistoryActivity;
 import com.owncloud.android.ui.activity.ManageAccountsActivity;
 import com.owncloud.android.ui.activity.ManageSpaceActivity;
@@ -84,7 +83,6 @@ abstract class ComponentsModule {
     @ContributesAndroidInjector abstract FilePickerActivity filePickerActivity();
     @ContributesAndroidInjector abstract FirstRunActivity firstRunActivity();
     @ContributesAndroidInjector abstract FolderPickerActivity folderPickerActivity();
-    @ContributesAndroidInjector abstract HookActivity hookActivity();
     @ContributesAndroidInjector abstract LogHistoryActivity logHistoryActivity();
     @ContributesAndroidInjector abstract ManageAccountsActivity manageAccountsActivity();
     @ContributesAndroidInjector abstract ManageSpaceActivity manageSpaceActivity();

src/main/java/com/owncloud/android/ui/activity/FileDisplayActivity.java

@@ -150,7 +150,7 @@ import androidx.fragment.app.FragmentTransaction;
  * Displays, what files the user has available in his ownCloud. This is the main view.
  */
 
-public class FileDisplayActivity extends HookActivity
+public class FileDisplayActivity extends FileActivity
         implements FileFragment.ContainerActivity,
         OnEnforceableRefreshListener, SortingOrderDialogFragment.OnSortingOrderListener,
         SendShareDialog.SendShareDialogDownloader, Injectable {