Remove unused argument.

llvm-svn: 178987
diff --git a/llvm/lib/Object/MachOObjectFile.cpp b/llvm/lib/Object/MachOObjectFile.cpp
index fdce21b..6f888fa 100644
--- a/llvm/lib/Object/MachOObjectFile.cpp
+++ b/llvm/lib/Object/MachOObjectFile.cpp
@@ -29,7 +29,7 @@
 
 MachOObjectFile::MachOObjectFile(MemoryBuffer *Object, MachOObject *MOO,
                                  error_code &ec)
-    : ObjectFile(Binary::ID_MachO, Object, ec),
+    : ObjectFile(Binary::ID_MachO, Object),
       MachOObj(MOO) {
   DataRefImpl DRI;
   moveToNextSection(DRI);