title: How to remove Angular material data table sorting direction empty state?
body: <p>Angular material sortion direction giving 3 states asc , desc, empty '',</p>
  <p><a href="https://i.stack.imgur.com/4rSBU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/4rSBU.png" alt="enter image description here" /></a></p>
  <p>I need sort table with two states only asc/desc , Is it possible to customize.</p>
  <p>Can any have idea on this.</p>
  <p>Than in advance</p>