lib/async/index.js
function remove (outputFile, done) {
    this.csFactory(function (_done) {
      this._remove(outputFile, done);
      _done();
    }.bind(this), L_WAIT)();
  }
function remove (outputFile, done) {
    this.csFactory(function (_done) {
      this._remove(outputFile, done);
      _done();
    }.bind(this), L_WAIT)();
  }
Remove a file from the files array if it's there.
Protected version.

@param {String} outputFile - The outputFile to remove.
@param {Boolean} done - If true, add to filesDone collection.