Block Editor: Remove CSS hack for Internet Explorer 11 (#63220)

Co-authored-by: t-hamano <wildworks@git.wordpress.org>
Co-authored-by: jasmussen <joen@git.wordpress.org>

packages/block-editor/src/components/block-toolbar/style.scss

@@ -24,8 +24,6 @@
 	.components-toolbar-group,
 	.components-toolbar {
 		background: none;
-		// IE11 has thick paddings without this.
-		line-height: 0;
 
 		// These margins make the buttons themselves overlap the chrome of the toolbar.
 		// This helps make them square, and maximize the hit area.
@@ -151,15 +149,7 @@
 }
 
 .block-editor-block-toolbar__slot {
-	// Required for IE11.
-	display: inline-block;
-	// Fix for toolbar button misalignment on IE11
-	line-height: 0;
-
-	// IE11 doesn't read rules inside this query. They are applied only to modern browsers.
-	@supports (position: sticky) {
-		display: inline-flex;
-	}
+	display: inline-flex;
 }
 
 .show-icon-labels {