Add RemoveRedundantBlocks

Fix red bots

Change-Id: I4d280a35766328e702e13be53d757934fe2f1ca4
diff --git a/src/main/java/com/android/tools/r8/ir/conversion/passes/KnownArrayLengthRewriter.java b/src/main/java/com/android/tools/r8/ir/conversion/passes/KnownArrayLengthRewriter.java
index 086a7e0..9ae7aab 100644
--- a/src/main/java/com/android/tools/r8/ir/conversion/passes/KnownArrayLengthRewriter.java
+++ b/src/main/java/com/android/tools/r8/ir/conversion/passes/KnownArrayLengthRewriter.java
@@ -76,6 +76,7 @@
 
       phiUsers.forEach(Phi::removeTrivialPhi);
     }
+    code.removeRedundantBlocks();
     assert code.isConsistentSSA(appView);
   }
 }