Remove unreachable return statement.

llvm-svn: 223920

lld/lib/ReaderWriter/Native/ReaderNative.cpp

@@ -1010,7 +1010,6 @@ public:
   parseFile(std::unique_ptr<MemoryBuffer> &mb, const class Registry &,
             std::vector<std::unique_ptr<File>> &result) const override {
     return lld::native::File::make(std::move(mb), result);
-    return std::error_code();
   }
 };
 }