Rollup merge of rust-lang#103370 - notriddle:notriddle/out-of-band, r=GuillaumeGomez

rustdoc: remove unused CSS `.out-of-band { font-weight: normal }`

This CSS was added in 083c395 to normalize the appearance of out-of-band elements that were nested directly below headers.

Now, the only use of `out-of-band` is in the main page header, and it is nested below a wrapper, not the `<h1>` itself.

Author: matthiaskrgr

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

@@ -634,7 +634,6 @@ pre.example-line-numbers {
 .out-of-band {
 	flex-grow: 0;
 	font-size: 1.125rem;
-	font-weight: normal;
 }
 
 .docblock code, .docblock-short code,