Method remove

tests/src/IO/WriterTest.h:41–45

        }

        void remove(const std::string& filename) {
            std::string full_name = m_tmp_dir + filename;
            int r = std::remove(full_name.c_str());
            ASSERT_EQ(0, r);
        }

        void assert_eq_vertices(MeshPtr mesh1, MeshPtr mesh2) {
            ASSERT_EQ(mesh1->get_dim(), mesh2->get_dim());