Twenty Seventeen: Remove code and checks for obsolete browsers.

Remove IE specific code from Twenty Seventeen. Remove custom IE stylesheet contents, the HTML5 shiv contents (also targeting Safari 4.x and Firefox 3.x), and IE-specific code. 

Props desrosj, sabernhardt, neychok, joedolson.
Fixes #58836.

git-svn-id: https://develop.svn.wordpress.org/trunk@60966 602fd350-edb4-49c9-b593-d223f7449a82

Author: joedolson

src/wp-content/themes/twentyseventeen/assets/css/ie8.css

@@ -1,225 +1 @@
-/*
-Theme Name: Twenty Seventeen
-Description: IE8 specific style.
-*/
-
-body {
-	font-size: 16px;
-}
-
-h1 {
-	font-size: 30px;
-	font-size: 1.875rem;
-}
-
-h2,
-.page .panel-content .recent-posts .entry-title {
-	font-size: 26px;
-	font-size: 1.625rem;
-}
-
-h3 {
-	font-size: 22px;
-	font-size: 1.375rem;
-}
-
-h4 {
-	font-size: 18px;
-	font-size: 1.125rem;
-}
-
-h5 {
-	font-size: 13px;
-	font-size: 0.8125rem;
-}
-
-h6 {
-	font-size: 16px;
-	font-size: 1rem;
-}
-
-img {
-	width: inherit;  /* Make images fill their parent's space. */
-}
-
-/* Fixes linked images */
-.entry-content a img,
-.widget a img {
-	filter: progid:DXImageTransform.Microsoft.DropShadow(OffX=0, OffY=5, Color=#ffffff);
-}
-
-/* Layout */
-
-.site-content {
-	padding: 6.5em 0 0;
-}
-
-/* Site Branding */
-
-.custom-header {
-	overflow: hidden;
-}
-
-.has-header-image.twentyseventeen-front-page .custom-header,
-.has-header-image.home.blog .custom-header {
-	display: block;
-}
-
-.custom-header-media {
-	background-position: bottom center;
-}
-
-.site-branding {
-	padding: 45px 0;
-}
-
-.has-header-image.twentyseventeen-front-page .site-branding,
-.has-header-image.home.blog .site-branding {
-	bottom: 0;
-	display: block;
-	left: 0;
-	height: auto;
-	padding-top: 0;
-	position: absolute;
-	width: 100%;
-}
-
-.has-header-image .custom-header-media img {
-	left: 0;
-	top: 0;
-}
-
-.site-title {
-	font-size: 36px;
-	font-weight: 700;
-}
-
-.site-description {
-	font-size: 16px;
-}
-
-/* Main Navigation */
-
-.navigation-top {
-	background: #fff;
-	position: relative;
-	z-index: 10;
-}
-
-.menu-toggle {
-	width: 150px;
-}
-
-.main-navigation ul#top-menu {
-	margin-bottom: -1px;
-	padding: 0;
-}
-
-.no-svg .dropdown-toggle {
-	padding: 0.25em 0 0;
-}
-
-.no-svg .dropdown-toggle.toggled-on {
-	padding: 0.75em 0 0;
-}
-
-.dropdown-toggle .svg-fallback.icon-angle-down {
-	-ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=-1, M12=1.2246467991473532e-16, M21=-1.2246467991473532e-16, M22=-1, SizingMethod='auto expand')";
-}
-
-.dropdown-toggle.toggled-on .svg-fallback.icon-angle-down {
-	-ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1, M12=0, M21=0, M22=1, SizingMethod='auto expand')";
-}
-
-/* Front Page */
-
-.twentyseventeen-front-page.has-header-image .custom-header,
-.blog.home.has-header-image .custom-header,
-.panel-image {
-	height: 800px;
-	max-height: 800px;
-	padding-top: 0;
-}
-
-.twentyseventeen-front-page .custom-header-media,
-.blog.home .custom-header-media {
-	background-position: center center;
-}
-
-.twentyseventeen-front-page.has-header-image .site-branding,
-.home.blog.has-header-image .site-branding {
-	bottom: 20px;
-	position: absolute;
-	width: 100%;
-}
-
-.page .panel-content .entry-title,
-.page-title,
-.page .entry-title {
-	font-size: 14px;
-	font-size: 0.875rem;
-	font-weight: 700;
-	letter-spacing: 0.14em;
-	text-transform: uppercase;
-}
-
-/* Posts */
-
-.blog .site-main > article,
-.archive .site-main > article,
-.search .site-main > article {
-	padding-bottom: 4em;
-}
-
-time.updated {
-	display: none;
-}
-
-time.published {
-	display: inline-block;
-}
-
-.blog .entry-title {
-	padding-top: 0;
-}
-
-.single-post .entry-title,
-.page .entry-title,
-.entry-meta + .entry-title {
-	font-size: 26px;
-	font-weight: 400;
-	letter-spacing: normal;
-	padding-top: 0;
-	text-transform: none;
-}
-
-.entry-footer .cat-links,
-.entry-footer .tags-links {
-	padding-left: 0;
-}
-
-.comment-author .avatar {
-	z-index: -1;
-}
-
-ol.children .children {
-	padding-left: 2em;
-}
-
-/* RTL Styles */
-
-.rtl .has-header-image.twentyseventeen-front-page .site-branding,
-.rtl .has-header-image.home.blog .site-branding {
-	left: auto;
-	right: 0;
-}
-
-.rtl .entry-footer .cat-links,
-.rtl .entry-footer .tags-links {
-	padding-right: 0;
-}
-
-.rtl ol.children .children {
-	padding-left: 0;
-	padding-right: 2em;
-}
+/* This theme does not support Internet Explorer since version 4.0. */

src/wp-content/themes/twentyseventeen/assets/css/ie9.css

@@ -1,43 +1 @@
-/*
-Theme Name: Twenty Seventeen
-Description: IE9 specific styles.
-*/
-
-.has-header-image.twentyseventeen-front-page .custom-header,
-.has-header-video.twentyseventeen-front-page .custom-header,
-.has-header-image.home.blog .custom-header,
-.has-header-video.home.blog .custom-header {
-	height: 300px;
-}
-
-.has-header-image .custom-header-media img,
-.has-header-video .custom-header-media video,
-.has-header-video .custom-header-media iframe {
-	min-width: 100%;
-}
-
-@media screen and (min-width: 30em) {
-
-	.has-header-image.twentyseventeen-front-page .custom-header,
-	.has-header-video.twentyseventeen-front-page .custom-header,
-	.has-header-image.home.blog .custom-header,
-	.has-header-video.home.blog .custom-header,
-	.twentyseventeen-front-page.has-header-image .custom-header-media,
-	.home.blog.has-header-image .custom-header-media,
-	.panel-image {
-		height: 700px;
-	}
-}
-
-@media screen and (min-width: 48em) {
-
-	.has-header-image.twentyseventeen-front-page .custom-header,
-	.has-header-video.twentyseventeen-front-page .custom-header,
-	.has-header-image.home.blog .custom-header,
-	.has-header-video.home.blog .custom-header,
-	.twentyseventeen-front-page.has-header-image .custom-header-media,
-	.home.blog.has-header-image .custom-header-media,
-	.panel-image {
-		height: 1000px;
-	}
-}
+/* This theme does not support Internet Explorer since version 4.0. */