Removes compile-time error from implementing the same interface more than once

compiler/java/com/google/dart/compiler/resolver/Resolver.java

Index: compiler/java/com/google/dart/compiler/resolver/Resolver.java
diff --git a/compiler/java/com/google/dart/compiler/resolver/Resolver.java b/compiler/java/com/google/dart/compiler/resolver/Resolver.java
index 1c9192eccce50f33697e097d33a4c0acae6552f8..0641384838ac17e259ba1914351601be2b47ee2f 100644
--- a/compiler/java/com/google/dart/compiler/resolver/Resolver.java
+++ b/compiler/java/com/google/dart/compiler/resolver/Resolver.java
@@ -264,11 +264,7 @@ public class Resolver {
           errorTarget = cls;
         }
         onError(errorTarget, ResolverErrorCode.CYCLIC_CLASS, e.getElement().getName());
-      } catch (DuplicatedInterfaceException e) {
-        onError(cls, ResolverErrorCode.DUPLICATED_INTERFACE,
-                        e.getFirst(), e.getSecond());
       }
-
       checkClassTypeVariables(classElement);
 
       // Push new resolution context.