Purge remaining references to removed western apps

The quattro upgrade script no longer registers the HEY mailto
handler, installer tips stop naming LibreOffice, and the hotkeys,
GUIs, and web-apps manuals drop the entries for removed apps.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QKxGW1raAWaqeU8WdHsMsp

bin/omarchy-provision-owner

@@ -186,7 +186,7 @@ tips=(
   "Share files with phones and laptops using LocalSend"
   "Turn any website into an app with Install > Web App in the menu"
   "Super + Return opens a terminal, Super + Shift + Return the browser"
-  "Edit images with Pinta, videos with Kdenlive, docs with LibreOffice"
+  "Edit images with Pinta and videos with Kdenlive"
   "Super + Ctrl + Print grabs text off the screen with OCR"
   "Print takes a screenshot, Alt + Print records the screen"
   "Set a reminder with Super + Ctrl + R"

bin/omarchy-upgrade-to-quattro

@@ -2196,10 +2196,6 @@ fi
 if command -v xdg-settings >/dev/null 2>&1; then
   env -u BROWSER xdg-settings set default-web-browser chromium.desktop || true
 fi
-if command -v xdg-mime >/dev/null 2>&1; then
-  xdg-mime default HEY.desktop x-scheme-handler/mailto || true
-fi
-
 # This script is fetched from the branch and runs against whatever packaged
 # tree the channel currently serves, so the packaged tree can be older than the
 # script. The completion markers are written directly rather than through