title: Trying to migrate to Github from Bitbucket, getting file size error
body: <p>I'm trying to migrate from bitbucket to github. What I did was remove bitbucket from the remote and add  my github account instead. I then tried to <code>git push -u origin master</code> but I got a <code>large file detected</code> error and then a <code>this exceeds Github's file size limit of 100MB</code>.</p>
  
  <p>I know which file is making the problem and I've deleted it a few commits ago but since it's still in previous commits it's still making problems. </p>
  
  <p>How can I fix this?</p>