text: it('basic', function() {
      const arr = [1, 2, 3, 4, 5];
      const evens = remove(arr, function(val) {
          return val % 2 === 0;
      });
      expect(arr).to.eql([1, 3, 5]);
      expect(evens).to.eql([2, 4]);
  });
  