Remove redundant blocks in enum unboxer

Bug: b/281975144
Change-Id: I192580be4c42cb4913f5589ead4942462a919203
diff --git a/src/main/java/com/android/tools/r8/ir/optimize/enums/EnumUnboxingRewriter.java b/src/main/java/com/android/tools/r8/ir/optimize/enums/EnumUnboxingRewriter.java
index 05648c3..fa88164 100644
--- a/src/main/java/com/android/tools/r8/ir/optimize/enums/EnumUnboxingRewriter.java
+++ b/src/main/java/com/android/tools/r8/ir/optimize/enums/EnumUnboxingRewriter.java
@@ -431,6 +431,7 @@
         }
       }
     }
+    code.removeRedundantBlocks();
     assert code.isConsistentSSABeforeTypesAreCorrect(appView);
     return affectedPhis;
   }