Hide the To add or manage payment methods section

[bsclifton]

Fixes brave/brave-browser#4076

Submitter Checklist:

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Verified that these changes build without errors on
  • Windows
  • macOS
  • Linux
• Verified that these changes pass automated tests (npm test brave_unit_tests && npm test brave_browser_tests && npm run test-security) on
  • Windows
  • macOS
  • Linux
• Verified that all lint errors/warnings are resolved (npm run lint)
• Ran git rebase master (if needed).
• Ran git rebase -i to squash commits (if needed).
• Tagged reviewers and labelled the pull request as needed.
• Request a security/privacy review as needed.
• Add appropriate QA labels (QA/Yes or QA/No) to include the closed issue in milestone

Test Plan:

See brave/brave-browser#4076

Reviewer Checklist:

• New files have MPL-2.0 license header.
• Request a security/privacy review as needed.
• Adequate test coverage exists to prevent regressions
• Verify test plan is specified in PR before merging to source

[bsclifton]

@petemill I figured a patch would be easier- but we could do this with the new patching system you had put together. Let me know if you'd like me to give that a go

[petemill]

If you want to use the new RegisterPolymerTemplateModifications function via settings_overrides.js, you could do something like:

{
	'settings-payments-section': function(templateContent) {
		const manageLink = templateContent.querySelector('#manageLink')
		if (!manageLink) {
			throw new Error('[Brave Settings Overrides] Could not find manage payments link')
		}
		manageLink.remove()
	}
}

[bsclifton]

@petemill updated! 😄Love doing it this way

[petemill]

Works great 👍