message: no need for omp in tester
diff: @@ -34,7 +34,6 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  #include <core/matrix/ell.hpp>
  -#include <omp.h>
  #include <random>
  @@ -99,7 +98,6 @@ protected:
  dbeta->copy_from(beta.get());
  }
  -
  std::shared_ptr<gko::ReferenceExecutor> ref;
  std::shared_ptr<const gko::OmpExecutor> omp;
  @@ -145,7 +143,6 @@ TEST_F(Ell, SimpleApplyWithPaddingIsEquivalentToRef)
  {
  set_up_apply_data(300, 600);
  - printf("running on %d threads\n", omp_get_num_threads());
  mtx->apply(y.get(), expected.get());
  dmtx->apply(dy.get(), dresult.get());
  