Remove conversion of ASCII emojis

Display emojis as intended by the sender, i.e. don't replace it.

Closes #10416.
2 jobs for fix_ascii_emoji in 7 minutes and 34 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #21261
code-quality

00:05:23

2.0%
 
  Build
passed #21262
linux

00:02:11