message: Remove unused article macros
diff: output: article,
  override: addOverride
  }
  -
  - Macro.add('setarticle', {
  - handler () {
  - const check = addOverride(this.args[0], this.args[1], this.args[2])
  - if (check && typeof check === 'string') {
  - this.error(check)
  - }
  - }
  - })
  -
  - Macro.add(['a', 'an', 'A', 'An'], {
  - handler () {
  - const isUpper = this.name.first() === this.name.first().toUpperCase()
  - this.output.append(article(String(this.args[0]), isUpper))
  - }
  - })
  })()
  