build-aux: Remove CEF stripping workaround

[tytan652]

Description

This cause issues in Flatpak IDE like GNOME Builder.

Motivation and Context

I cause this issue, I fix it.

Anyway, all original CEF files (including debug files) are cleaned up at the end. Avoid issues is better than gaining time.

How Has This Been Tested?

Run the Flatpak in GNOME Builder and then re-run it.

• Without PR: Ninja will complain about missing CEF target
• With PR: GNOME Builder will ran OBS Studio

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• [x] My code has been run through clang-format.
• [x] I have read the contributing document.
• [x] My code is not on the master branch.
• [x] The code has been tested.
• [x] All commit messages are properly formatted and commits squashed where appropriate.
• [x] I have included updates to all appropriate documentation.