Revert to installing steam as a .deb package

Flatpak seems to complicate Steam's execution of Proton

overlay/opt/scripts/install_steam.sh

@@ -1,78 +0,0 @@
-#!/usr/bin/env bash
-
-echo "**** Installing/upgrading Steam via flatpak ****"
-
-# Install Steam client
-flatpak --user remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo 
-flatpak --user install --assumeyes --or-update flathub com.valvesoftware.Steam
-# Configure any required overrides
-flatpak --user override --filesystem=/mnt/games com.valvesoftware.Steam
-# TODO: Check if we should add /dev/dri here??
-
-# Configure default steam library paths
-echo "Configure Steam default libraries..."
-mkdir -p /mnt/games/GameLibrary/SteamLibrary
-libraryfolders="$(cat <<EOF
-"libraryfolders"
-{
-        "0"
-        {
-                "path"          "${USER_HOME:?}/.var/app/com.valvesoftware.Steam/.local/share/Steam"
-                "label"         ""
-                "contentid"             "5619710282499379610"
-                "totalsize"             "0"
-                "update_clean_bytes_tally"              "0"
-                "time_last_update_corruption"           "0"
-                "apps"
-                {
-                }
-        }
-        "1"
-        {
-                "path"          "/mnt/games/GameLibrary/SteamLibrary"
-                "label"         "Mounted Games"
-                "contentid"             "4437054932394438372"
-                "totalsize"             "0"
-                "update_clean_bytes_tally"              "0"
-                "time_last_update_corruption"           "0"
-                "apps"
-                {
-                }
-        }
-}
-EOF
-)"
-if [[ ! -f ${USER_HOME:?}/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/libraryfolders.vdf ]]; then
-    mkdir -p ${USER_HOME:?}/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps
-    echo "${libraryfolders}" > ${USER_HOME:?}/.var/app/com.valvesoftware.Steam/.local/share/Steam/steamapps/libraryfolders.vdf
-fi
-if [[ ! -f ${USER_HOME:?}/.var/app/com.valvesoftware.Steam/.local/share/Steam/config/libraryfolders.vdf ]]; then
-    mkdir -p ${USER_HOME:?}/.var/app/com.valvesoftware.Steam/.local/share/Steam/config
-    echo "${libraryfolders}" > ${USER_HOME:?}/.var/app/com.valvesoftware.Steam/.local/share/Steam/config/libraryfolders.vdf
-fi
-# Remove old autostart script if pointing to old native debian steam launcher
-mkdir -p "${USER_HOME:?}/.config/autostart"
-if grep "Exec=/usr/games/steam %U" "${USER_HOME:?}/.config/autostart/Steam.desktop" &> /dev/null; then
-    rm -fv  "${USER_HOME:?}/.config/autostart/Steam.desktop"
-fi
-# Create autostart script if missing
-steam_autostart_desktop="$(cat <<EOF
-[Desktop Entry]
-Encoding=UTF-8
-Type=Application
-Name=Steam
-Comment=Launch steam on login
-Exec=/usr/bin/flatpak run --branch=stable --arch=x86_64 --command=/app/bin/steam-wrapper --file-forwarding com.valvesoftware.Steam -silent
-Icon=steam
-OnlyShowIn=XFCE;
-RunHook=0
-StartupNotify=false
-Terminal=false
-Hidden=false
-EOF
-)"
-if [[ ! -f "${USER_HOME:?}/.config/autostart/Steam.desktop" ]]; then
-    echo "${steam_autostart_desktop:?}" > "${USER_HOME:?}/.config/autostart/Steam.desktop"
-fi
-
-echo "DONE"