Rollup merge of #74505 - Cldfire:fix-search-focus, r=GuillaumeGomez

Fix search input focus in ayu theme

Closes #74496.

Before:

![image](https://user-images.githubusercontent.com/13814214/87868463-d0c8fe80-c963-11ea-9003-aa578d869e98.png)

After:

![image](https://user-images.githubusercontent.com/13814214/87868467-dc1c2a00-c963-11ea-89a8-1280f68ff9df.png)

Author: Manishearth

src/librustdoc/html/static/themes/ayu.css

@@ -237,16 +237,6 @@ a {
 
 #crate-search+.search-input:focus {
 	box-shadow: 0 0 0 1px #148099,0 0 0 2px transparent;
-	color: #ffffff;
-	background-color: #141920;
-	box-shadow: none;
-	transition: box-shadow 150ms ease-in-out;
-	border-radius: 4px;
-	margin-left: 8px;
-}
-
-#crate-search+.search-input:focus {
-	box-shadow: 0px 6px 20px 0px black;
 }
 
 .search-focus:disabled {