lib/operations/collection_ops.js
function dropIndexes(coll, options, callback) {
  dropIndex(coll, '*', options, err => {
    if (err) return handleCallback(callback, err, false);
    handleCallback(callback, null, true);
  });
}
function dropIndexes(coll, options, callback) {
  dropIndex(coll, '*', options, err => {
    if (err) return handleCallback(callback, err, false);
    handleCallback(callback, null, true);
  });
}
function dropIndexes ( coll , options , callback ) { dropIndex ( coll , '*' , options , err => { if ( err ) return handleCallback ( callback , err , false ) ; handleCallback ( callback , null , true ) ; } ) ; }
Drop all indexes from this collection.

@method
@param {Collection} a Collection instance.
@param {Object} [options] Optional settings. See Collection.prototype.dropIndexes for a list of options.
@param {Collection~resultCallback} [callback] The command result callback
Drop all indexes from this collection .