message: Remove old note about Mesa bug
diff: @@ -191,10 +191,6 @@ Just Works.
  - _Is it really the fastest terminal emulator?_ In the terminals I've
  benchmarked against, alacritty is either faster, WAY faster, or at least
  neutral. There are no benchmarks in which I've found Alacritty to be slower.
  -- _It's not fast! Why?_ There's a known bug affecting some versions of
  - Mesa/libxcb where calls to glClear take an insanely long time. If it's not
  - that, there's probably another bug. I'd be happy to look at the issue if you
  - can provide some profiling information (wall time and otherwise).
  - _macOS + tmux + vim is slow! I thought this was supposed to be fast!_ This
  appears to be an issue outside of terminal emulators; either macOS has an IPC
  performance issue, or either tmux or vim (or both) have a bug. This same issue
  