By default gnome-shell has an accessibility menu visible in the shell. I get that this is sensible by default. But I don’t need it and it bothers me that I can’t remove it.
User fpmurphy over at fedoraforum has posted a shell extension that removes the offending icon.
I have created a tarball of the extension. Download it here and extract it to “~/.local/share/gnome-shell/extensions”
$ cd ~/.local/share/gnome-shell/extensions
$ unzip gnome-shell-extensions-noa11y.zip
Then restart the shell. Hit “Alt+f2”, and type “r”.