title: Given a set of ids, remove all documents with those ids
body: <p>I need to remove a set of ids using an object which contains those ids. Right now I am iteratively removing ti. Is it possible to remove them at once?</p>
  
  <p>My code (iteratively):
  </p>
  
  <pre><code>remove_data(doc[0]._id,function(result){
      for(entry in result) {
          db.mydata.remove({"_id":result[entry]}, function(err,doc) {
              if(err) throw err;            
          });
      }
  });
  </code></pre>
  
  <p>Also I need to pass a callback after this is done.</p>