title: How can I disable elixir compiler warnings
body: <p>When I do</p>
  
  <pre><code>mix compile
  </code></pre>
  
  <p>I get messages like</p>
  
  <pre><code>warning: variable "test_val" is unused
  lib/myapp/mymodule.ex:46
  </code></pre>
  
  <p>I'm just hacking on a side project and I don't care about these warnings for now. Is there a way to turn this off?</p>