Removed vim mode lines.

Users can set their own preferences in their personal vimrc.

src/lib_json/json_reader.cpp

@@ -842,4 +842,3 @@ std::istream &operator>>(std::istream &sin, Value &root) {
 }
 
 } // namespace Json
-// vim: et ts=2 sts=2 sw=2 tw=0