Prune commentary and stale Rust port notes

run-headless.sh

@@ -51,7 +51,6 @@
 set -eu
 
 here=$(cd "$(dirname "$0")" && pwd)
-# The workspace `--dir` selects; see the header. `$here` is iris itself.
 workdir="$here"
 run="${XDG_RUNTIME_DIR:-/tmp}/iris-headless"
 seconds=3
@@ -103,8 +102,6 @@ if ! swaymsg -t get_version >/dev/null 2>&1; then
     }
 fi
 
-# Asked of the compositor rather than guessed: sway takes the first free
-# wayland-N, and this machine may already have one.
 rm -f "$run/display"
 swaymsg exec -- "sh -c 'printf %s \"\$WAYLAND_DISPLAY\" > $run/display'" >/dev/null
 i=0
@@ -165,7 +162,6 @@ while [ $i -lt 40 ]; do
     i=$((i + 1)); sleep 0.25
 done
 
-# Then settle, for whatever the example does after its first frame.
 i=0
 while [ $i -lt "$((seconds * 2))" ]; do
     kill -0 "$pid" 2>/dev/null || break