Fix: "Look & feel" text should be removed from Shields global settings page

[TheAresjej]

Resolves #22382

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• Checked the PR locally: npm run test -- brave_browser_tests, npm run test -- brave_unit_tests, npm run lint, npm run gn_check, npm run tslint
• Ran git rebase master (if needed)

Reviewer Checklist:

• A security review is not needed, or a link to one is included in the PR description
• New files have MPL-2.0 license header
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
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• Code follows the style guide
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After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on
• All relevant documentation has been updated, for instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protections
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Custom-Headers
  • https://github.com/brave/brave-browser/wiki/Web-Compatibility-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

[simonhong]

@TheAresjej Let's delete Look & Feel string also from brave_generated_resources.grd as it's not used anymore.
and can you attach screenshot of updated shields settings page?

[TheAresjej]

Let's delete Look & Feel string also from brave_generated_resources.grd as it's not used anymore. and can you attach screenshot of updated shields settings page?

@simonhong I've made the correction, but so far I'm not quite sure how I can make this screenshot 😅

[simonhong]

Let's delete Look & Feel string also from brave_generated_resources.grd as it's not used anymore. and can you attach screenshot of updated shields settings page?

@simonhong I've made the correction, but so far I'm not quite sure how I can make this screenshot 😅

I think you can use any screen capture tool based on your OS. (ex, cmd+shift+4 on macOS)
I wanna see proper separator line is rendered after deleting Look & Feel. It should have divider after deleting.

and I think you have something more. I assume this PR has build failure :)