Remove unused argument.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178987 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Object/ObjectFile.cpp b/lib/Object/ObjectFile.cpp
index 860c87b..518959a 100644
--- a/lib/Object/ObjectFile.cpp
+++ b/lib/Object/ObjectFile.cpp
@@ -23,7 +23,7 @@
 
 void ObjectFile::anchor() { }
 
-ObjectFile::ObjectFile(unsigned int Type, MemoryBuffer *source, error_code &ec)
+ObjectFile::ObjectFile(unsigned int Type, MemoryBuffer *source)
   : Binary(Type, source) {
 }