Issue #2021073 by echoz: Remove Seven's ie.css.

core/themes/seven/ie.css

-/* IE renders monospace font too big. */
-code,
-pre,
-kbd {
-  font-size: 1em;
-}
-
-/* Node Add/Edit Page Layout */
-
-.layout-node-form {
-  overflow: hidden;
-}
-
-.overlay .node-actions {
-  margin-bottom: 1em;
-}
-
-.node-main-content,
-.node-actions {
-  padding: 0.5em 1.5em 0 1.5em;
-}
-
-/**
- * 1. Applies the Position Is Everything technique for equal-height columns;
- *    @see http://www.positioniseverything.net/articles/onetruelayout/equalheight
- * 2. When animating the height of elements within this region, prevent
- *    vertical jittering of elements further down in the document flow.
- */
-.node-advanced-settings {
-  margin-bottom: -999em;
-  padding-bottom: 999em;
-  display: table;
-
-  -moz-box-shadow: inset 0.1em -1em 0.6em rgba(100, 100, 100, .1);
-  -webkit-box-shadow: inset 0.1em -1em 0.6em rgba(100, 100, 100, .1);
-  box-shadow: inset 0.1em -1em 0.6em rgba(100, 100, 100, .1);
-  border: none;
-}
\ No newline at end of file

core/themes/seven/seven.theme

@@ -22,8 +22,6 @@ function seven_preprocess_maintenance_page(&$vars) {
  */
 function seven_preprocess_html(&$vars) {
   drupal_add_library('system', 'normalize');
-  // Add conditional CSS for IE8 and below.
-  drupal_add_css(path_to_theme() . '/ie.css', array('group' => CSS_AGGREGATE_THEME, 'browsers' => array('IE' => 'lte IE 8', '!IE' => FALSE), 'weight' => 999, 'preprocess' => FALSE));
 }
 
 /**