Revert "fix(aur): add -a flag to yay command to assume AUR packages (#4581)"

This reverts commit b3dd14a038.

bin/omarchy-pkg-aur-install

@@ -20,7 +20,7 @@ pkg_names=$(yay -Slqa | fzf "${fzf_args[@]}")
 
 if [[ -n "$pkg_names" ]]; then
   # Convert newline-separated selections to space-separated for yay
-  echo "$pkg_names" | tr '\n' ' ' | xargs yay -S -a --noconfirm
+  echo "$pkg_names" | tr '\n' ' ' | xargs yay -S --noconfirm
   sudo updatedb
   omarchy-show-done
 fi