Superfluous `label` styling

[jfrech]

The example variable-fonts/font-weight.html does not employ the label tag, yet styles it:

css-examples/variable-fonts/font-weight.html

Lines 25 to 29 in 3e820ce

	label {
	font: 1rem monospace;
	white-space: nowrap;
	}

css-examples/variable-fonts/font-weight.html

Lines 53 to 57 in 3e820ce

	label {
	font: 1rem monospace;
	white-space: nowrap;
	}

[caugner]

@jfrech Please feel free to open a PR to remove the unnecessary CSS rule.