Remove unneeded scope creation.

Change-Id: Ie860bd72e021638a87ad8f75db4a2bb4d4af406a
diff --git a/src/main/java/com/android/tools/r8/shaking/Enqueuer.java b/src/main/java/com/android/tools/r8/shaking/Enqueuer.java
index 27b2da7..a5f1db6 100644
--- a/src/main/java/com/android/tools/r8/shaking/Enqueuer.java
+++ b/src/main/java/com/android/tools/r8/shaking/Enqueuer.java
@@ -739,7 +739,6 @@
       transitionNonAbstractMethodsToLiveAndShadow(
           reachableMethods.getItems(), instantiatedType, seen.newNestedScope());
     }
-    seen = seen.newNestedScope();
     for (DexType subInterface : clazz.interfaces.values) {
       transitionDefaultMethodsForInstantiatedClass(subInterface, instantiatedType, seen);
     }