Remain landscape after media dismiss

Now that we support landscape everywhere, there's no need to force portrait upon leaving media.

Signal/src/ViewControllers/MediaPageViewController.swift

@@ -607,10 +607,10 @@ class MediaPageViewController: UIPageViewController, UIPageViewControllerDataSou
             return
         }
 
-        mediaGalleryDataSource.dismissMediaDetailViewController(self, animated: isAnimated) {
-            UIDevice.current.ows_setOrientation(.portrait)
-            completion?()
-        }
+        mediaGalleryDataSource.dismissMediaDetailViewController(self,
+                                                                animated: isAnimated,
+                                                                completion: completion)
+
     }
 
     // MARK: MediaDetailViewControllerDelegate