title: Is there way to remove element from list in Mathematica
body: <p>Is there function in Wolfram Mathematica for removing element from original list? 
  For example </p>
  
  <pre><code>a={1,2,3};
  DeleteFrom[a,1];
  a
  
  a={2,3}
  </code></pre>
  
  <p>If it is absent can anyone give example of efficient variant of such function?
  (I know that there is function Delete() but it will create new list. This is not good if list is big)</p>