Keep rc on its own mirror but use the edge package repo

bin/omarchy-version-channel

@@ -16,8 +16,6 @@ if grep -q "https://pkgs.omarchy.org/stable/" /etc/pacman.conf; then
   pkgs="stable"
 elif grep -q "https://pkgs.omarchy.org/edge/" /etc/pacman.conf; then
   pkgs="edge"
-elif grep -q "https://pkgs.omarchy.org/rc/" /etc/pacman.conf; then
-  pkgs="rc"
 else
   pkgs="unknown"
 fi