Fix fit padding bottom zero for scene

app/src/main/java/com/hippo/ehviewer/ui/ContentActivity.java

@@ -57,11 +57,6 @@ public class ContentActivity extends StageActivity
         }
     }
 
-    @Override
-    public int getFitPaddingBottom() {
-        return 0;
-    }
-
     @Override
     public @NonNull StageLayout getStageLayout() {
         return mContentLayout;