title: How to delete graph in Titan with Cassandra storage backend?
body: <p>I use Titan 0.4.0 All, running Rexster in shared VM mode on Ubuntu 12.04.</p>
  
  <p>How could I properly delete a graph in Titan which is using the Cassandra storage backend?</p>
  
  <p>I have tried the <code>TitanCleanup.clear(graph)</code>, but it does not delete everything. The indices are still there. My real issue is that I have an index which I don't want (it crashes every query), however as I understand Titan's documentation <a href="https://github.com/thinkaurelius/titan/wiki/Titan-Limitations#unable-to-drop-key-indices" rel="nofollow">it is impossible to remove an index once it is created</a>.</p>