removed unneeded import. fixes travis build
diff --git a/src/objective-c/tests/InteropTests.m b/src/objective-c/tests/InteropTests.m
index a2f63ac..494743d 100644
--- a/src/objective-c/tests/InteropTests.m
+++ b/src/objective-c/tests/InteropTests.m
@@ -40,7 +40,6 @@
 #import <GRPCClient/GRPCCall+Tests.h>
 #import <GRPCClient/GRPCCall+Cronet.h>
 #import <ProtoRPC/ProtoRPC.h>
-#import <RemoteTest/Empty.pbobjc.h>
 #import <RemoteTest/Messages.pbobjc.h>
 #import <RemoteTest/Test.pbobjc.h>
 #import <RemoteTest/Test.pbrpc.h>