Support ABP/EL {remove: true;} as alias for :remove() #3451

Prerequisites

• I verified that this is not a filter list issue. Report any issues with filter lists or broken website functionality in the uAssets issue tracker.
• This is NOT a YouTube, Facebook or Twitch report. These sites MUST be reported by clicking their respective links.
• This is not a support issue or a question. For support, questions, or help, visit /r/uBlockOrigin.
• I performed a cursory search of the issue tracker to avoid opening a duplicate issue.
• The issue is not present after disabling uBO in the browser.
• I checked the documentation to understand that the issue I am reporting is not normal behavior.

I tried to reproduce the issue when...

• uBO is the only extension.
• uBO uses default lists and settings.
• using a new, unmodified browser profile.

Description

Currently ABP is supporting removing elements by {remove: true;}: https://gitlab.com/eyeo/adblockplus/abc/webext-ad-filtering-solution/-/releases/1.3.0

And looks like EL is starting to support that syntax as well: easylist/easylist@99c717fac

So I think we could add alias support for {remove: true;} then we can delegate some filters in uAssets to EL?

A specific URL where the issue occurs.

https://www.euronews.com/next/2024/11/12/europes-answer-to-google-ecosia-and-qwant-partner-to-build-new-search-index

Steps to Reproduce

1. Check for the filter euronews.com###o-site-hr__leaderboard-wallpaper.u-show-for-xlarge {remove:true;} in EL
2. The filter is marked as invalid

Expected behavior

{remove: true;} filters are supported

Actual behavior

{remove: true;} filters are not supported

uBO version

1.61.0

Browser name and version

Firefox 132.0.2

Operating System and version

Windows 10