Rollup merge of rust-lang#103494 - notriddle:notriddle/test-arrow-hov…

…er, r=GuillaumeGomez

rustdoc: remove redundant CSS `a.test-arrow:hover`

In 4b402db, when this rule was added, it was overriding a rule that made all links in docblock get an underline when hovered. This became redundant when, after reordering the rules, 7585632 changed the pro-underline rule to exclude the test-arrow link anyway.

src/librustdoc/html/static/css/rustdoc.css

@@ -1228,9 +1228,6 @@ a.test-arrow {
 .example-wrap:hover .test-arrow {
 	visibility: visible;
 }
-a.test-arrow:hover {
-	text-decoration: none;
-}
 
 .code-attribute {
 	font-weight: 300;