Small touchup removing patch that should not have in past commit

Author: eddelbuettel

inst/include/unsupported/Eigen/src/SparseExtra/MatrixMarketIterator.h

@@ -171,9 +171,7 @@ class MatrixMarketIterator {
       std::string curfile;
       curfile = m_folder + "/" + m_curs_id->d_name;
       // Discard if it is a folder
-#if !(defined(__sun) || defined(_AIX) || defined(__hpux) || defined(__sgi) || defined(__HAIKU__))
       if (m_curs_id->d_type == DT_DIR) continue;  // FIXME This may not be available on non BSD systems
-#endif
       //         struct stat st_buf;
       //         stat (curfile.c_str(), &st_buf);
       //         if (S_ISDIR(st_buf.st_mode)) continue;