Remove CSS rule so that out.width can be applied on a chunk

[cderv]

fix #286. This seems possible as width is also set / unset in JS for knitr plot output

distill/inst/rmarkdown/templates/distill_article/resources/distill.html

Lines 1285 to 1296 in 0e06b3f

	$('.layout-chunk').each(function(i, val) {
	var figures = $(this).find('img, .html-widget');
	// ignore leaflet img layers (#106)
	figures = figures.filter(':not(img[class*="leaflet"])')
	if ($(this).attr('data-layout') !== "l-body") {
	figures.css('width', '100%');
	} else {
	figures.css('max-width', '100%');
	figures.filter("[width]").each(function(i, val) {
	var fig = $(this);
	fig.css('width', fig.attr('width') + 'px');
	});

This way the CSS rule would not take precedence over a CSS style value set on image using out.width