Remove the once-placeholder-esque "tag hint", which has not worked in quite some time.

It's not particularly useful, and adds visual noise when in place.

props welcher.
fixes #31485.

Built from https://develop.svn.wordpress.org/trunk@31607


git-svn-id: http://core.svn.wordpress.org/trunk@31588 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/edit-rtl.css

@@ -1063,15 +1063,6 @@ span.description,
   13.0 - Tags
 ------------------------------------------------------------------------------*/
 
-.tagsdiv {
-	margin-top: -8px;
-}
-
-#poststuff .taghint {
-	color: #aaa;
-	margin: 15px 12px -24px 0;
-}
-
 #poststuff .tagsdiv .howto {
 	margin: 0 0 6px 0;
 }
@@ -1096,21 +1087,6 @@ span.description,
 	margin: 0 5px;
 }
 
-/* tag hints */
-.taghint {
-	color: #aaa;
-	margin: -17px 7px 0 0;
-	visibility: hidden;
-}
-
-input.newtag ~ div.taghint {
-	visibility: visible;
-}
-
-input.newtag:focus ~ div.taghint {
-	visibility: hidden;
-}
-
 p.popular-tags {
 	border: none;
 	line-height: 2em;