code: function (filePath) {
      var removeFile = this._removeFile.bind(this)
      var message = 'Should I remove `' + filePath + '`?'
  
      var promptPromise = this.ui.prompt({
        type: 'confirm',
        name: 'answer',
        message: message,
        choices: [
          { key: 'y', name: 'Yes, remove it', value: 'yes' },
          { key: 'n', name: 'No, leave it there', value: 'no' }
        ]
      })
  
      return promptPromise.then(function (response) {
        if (response.answer) {
          return removeFile(filePath)
        } else {
          return RSVP.resolve()
        }
      })
    }
docs: Prompt the user about whether or not they want to remove the given file
  
  @param {string} filePath the path to the file
  @return {RSVP.Promise}