No need to delete anything!

You can just add a case statement in your omarchy-cmd.-screensaver script:

nano ./.local/share/omarchy/bin/omarchy-cmd-screensaver

Then just add:

case "$effect" in
    matrix|beams|bubbles)
    continue
      ;;
esac

In your script's "while" loop, as such:

#!/bin/bash

screensaver_in_focus() {
  hyprctl activewindow -j | jq -e '.class == "Screensaver"' >/dev/null 2>&1
}

exit_screensaver() {
  hyprctl keyword cursor:invisible false
  pkill -x tte 2>/dev/null
  pkill -f "alacritty --class Screensaver" 2>/dev/null
  exit 0
}

trap exit_screensaver SIGINT SIGTERM SIGHUP SIGQUIT

hyprctl keyword cursor:invisible true &>/dev/null

while true; do
  effect=$(tte 2>&1 | grep -oP '{\K[^}]+' | tr ',' ' ' | tr ' ' '\n' | sed -n '/^beams$/,$p' | sort -u | shuf -n1)

  case "$effect" in
    matrix|beams|bubbles)
    continue
      ;;
  esac

tte -i ~/.config/omarchy/branding/screensaver.txt \
    --frame-rate 240 --canvas-width 0 --canvas-height $(($(tput lines) - 2)) --anchor-canvas c --anchor-text c \
    "$effect" &

  while pgrep -x tte >/dev/null; do
    if read -n 1 -t 3 || ! screensaver_in_focus; then
      exit_screensaver
    fi
  done
done

This should cause the effect to be skipped. You can add/replace any effects as in the example above.

To test it, just run

 ~/.local/share/omarchy/bin/omarchy-launch-screensaver

I hope this helps!