src/index.js
function clean (callback) {
  if (this._clobber) {
    rimraf(path.join(destination, this._clobberGlob), callback);
  }
  else {
    callback(null);
  }
}
function clean (callback) {
  if (this._clobber) {
    rimraf(path.join(destination, this._clobberGlob), callback);
  }
  else {
    callback(null);
  }
}
function clean ( callback ) { if ( this . _clobber ) { rimraf ( path . join ( destination , this . _clobberGlob ) , callback ) ; } else { callback ( null ) ; } }
Clean destination if clobber
@param {Function} callback
Clean destination if clobber