title: Disable microphone button in UITextField keyboard
body: <p>I have a UITextField, and the keyboard shows a mic button, which I'd like to disable. I'm especially concerned that it shouldn't show on iPhone X.</p>
  
  <p>I already disabled the Emoji keyboard by setting the keyboard type to "ASCII Capable". Is there another setting to remove dictation?</p>
  
  <p><img src="https://i.stack.imgur.com/akKoq.png" alt=""></p>