title: Django south, remove a specific migration
body: <p>In the process of learning south I've made some mistakes which I'd like to recitfy.  Here's one of them:</p>
  
  <pre><code># migrate --list
  (*) 0002_auto__add_lesson #add the table
  (*) 0003_auto__del_lesson #dammit, table uses wrong db engine so delete it
  (*) 0004_auto__add_lesson #recreate the table
  </code></pre>
  
  <p>Clearly, I can just run step 4 and 2 and 3 won't be applied if they're starred:</p>
  
  <pre><code>./migrate my_app 0004
  </code></pre>
  
  <p>But as step 2 and 3 are redundant and don't need to be run, is it possible to simply remove them?  Also, I should add Im worried someone might just run migrate which would then delete the table (and any data) and then recreate it...</p>
  
  <p>Thanks in advance,</p>