remove duplicate error message.

llvm-svn: 54090
diff --git a/clang/test/SemaObjC/interface-1.m b/clang/test/SemaObjC/interface-1.m
index 0130a33..d93f29c 100644
--- a/clang/test/SemaObjC/interface-1.m
+++ b/clang/test/SemaObjC/interface-1.m
@@ -3,7 +3,7 @@
 
 @interface NSWhatever :
 NSObject     // expected-error {{cannot find interface declaration for 'NSObject'}}
-<NSCopying>  // expected-error {{cannot find protocol definition for 'NSCopying'}}
+<NSCopying>  // expected-error {{cannot find protocol declaration for 'NSCopying'}}
 @end