update: remove -debug packages whose package is gone

makepkg builds pkg-debug alongside an AUR package, and removing the
package leaves it behind: the migration that dropped asdf-vm left
asdf-vm-debug. Found by 30-upgrade-from-baseline at 0c0ddf5, whose
machine kept it where a fresh install has none.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

updates.d/95-cleanup.sh

@@ -10,6 +10,17 @@ if command -v paccache &>/dev/null; then
   sudo paccache -ruk0
 fi
 
+# makepkg builds pkg-debug alongside an AUR package, and removing the package
+# leaves it behind (asdf-vm-debug). Without its package it's no use to anyone,
+# so remove it without asking. The exact name: pacman -Q herdr finds herdr-bin
+mapfile -t STRAY_DEBUG < <(pacman -Qqm 2> /dev/null | grep -- '-debug$' | while read -r pkg; do
+  [ "$(pacman -Qq "${pkg%-debug}" 2> /dev/null)" = "${pkg%-debug}" ] || echo "$pkg"
+done)
+if (( ${#STRAY_DEBUG[@]} > 0 )); then
+  echo "Removing debug symbols for packages that are gone: ${STRAY_DEBUG[*]}"
+  sudo pacman -R --noconfirm "${STRAY_DEBUG[@]}" || exit 1
+fi
+
 # Offer to remove packages that were installed as dependencies and are no
 # longer needed (packages something lists as an optional dependency are kept).
 # Ask first: one may be something you use directly. Without a terminal to ask