Pacman hooks implemented since January (5.0.0): https://git.archlinux.org/pacman.git/tree/NEWS

google-chrome-beta.install

@@ -12,16 +12,7 @@ bold="${all_off}$(tput bold)"
 blue="${bold}$(tput setaf 4)"
 yellow="${bold}$(tput setaf 3)"
 
-_update() {
-    msg_blue "Updating desktop MIME database..."
-    update-desktop-database -q
-    
-    msg_blue "Updating icon cache.."
-    xdg-icon-resource forceupdate --theme hicolor &>/dev/null
-}
-
 post_install() {
-    _update
     note "Custom flags should be put directly in: ~/.config/chrome-beta-flags.conf"
     note "The launcher is called: 'google-chrome-beta'"
 }
@@ -29,7 +20,3 @@ post_install() {
 post_upgrade() {
     post_install
 }
-
-post_remove() {
-    _update
-}