Question: Is this module needed anymore? Is it builtin to Home Assistant?

[mkanet]

I use the below theme options to blur the background when foreground objects are opened. I added this module manually in HACS and added a reference to it in ui-lovelace.yaml file.

Question: Is this module still needed? I heard that Home Assistant already has this capability builtin. I

Blur background for popups

dialog-backdrop-filter: blur(12px) iron-overlay-backdrop-opacity: 0 iron-overlay-backdrop-background-color: rgba(0, 0, 0, 0.32)

The reason I ask is that I'm getting web browser errors even after removing: /hacsfiles/popup-backdrop-filter/popup-backdrop-filter.js ...and commenting out the below lines in the ui-lovelace.yaml file:

# Blur background for popups
dialog-backdrop-filter: blur(12px)
iron-overlay-backdrop-opacity: 0
iron-overlay-backdrop-background-color: rgba(0, 0, 0, 0.32)

If this module is not needed anymore since its builtin to Home Assistant, what's the correct way to cleanly remove it from my setup? Is it stuck in cache somewhere?