Android: Simplify isTablet and InterfaceRegistrars

ui/android/java/src/org/chromium/ui/base/DeviceFormFactor.java

Index: ui/android/java/src/org/chromium/ui/base/DeviceFormFactor.java
diff --git a/ui/android/java/src/org/chromium/ui/base/DeviceFormFactor.java b/ui/android/java/src/org/chromium/ui/base/DeviceFormFactor.java
index b7f9f20d70557b107362f8f5dfd10ae7fd417cde..5a1a07be53dd0447ba3a628feb9e0875d80bcf04 100644
--- a/ui/android/java/src/org/chromium/ui/base/DeviceFormFactor.java
+++ b/ui/android/java/src/org/chromium/ui/base/DeviceFormFactor.java
@@ -28,12 +28,6 @@ public class DeviceFormFactor {
     private static Integer sMinimumTabletWidthPx;
     private static Float sDensity;
 
-    /**  TODO(wnwen): Remove when downstream is migrated. */
-    @Deprecated
-    public static boolean isTablet(Context context) {
-        return isTablet();
-    }
-
     /**
      * @return Whether the app should treat the device as a tablet for layout. This method is not
      *         affected by Android N multi-window.