The rule for nested lists in `normalize.css` and `opinionated.css` is no longer necessary

[germanfrelo]

The rule "Remove the margin on nested lists in Chrome, Edge, and Safari" appears in both normalize.css and opinionated.css:

normalize.css/normalize.css

Lines 32 to 39 in 0774d10

	/**
	* Remove the margin on nested lists in Chrome, Edge, and Safari.
	*/
	:where(dl, ol, ul) :where(dl, ol, ul) {
	margin-block-end: 0;
	margin-block-start: 0;
	}

normalize.css/opinionated.css

Lines 40 to 47 in 0774d10

	/**
	* Remove the margin on nested lists in Chrome, Edge, and Safari.
	*/
	:where(dl, ol, ul) :where(dl, ol, ul) {
	margin-block-end: 0;
	margin-block-start: 0;
	}

Since Chromium and WebKit already have that rule in their UA stylesheets, I think it can be removed.

• Chromium fixed it 1 year ago: https://github.com/chromium/chromium/blob/0fa7607bb96dc68c2d08d9920ce5da6bc4d3287a/third_party/blink/renderer/core/html/resources/html.css#L358-L365
• WebKit fixed it 3 years ago: https://github.com/WebKit/WebKit/blob/b524a4ebf3a70a7b6409c55db9eae74800721dc7/Source/WebCore/css/html.css#L308-L315