Rollup merge of rust-lang#104466 - notriddle:notriddle/crate-search-div-display, r=GuillaumeGomez

rustdoc: remove no-op CSS `#crate-search-div { display: inline-block }`

`#crate-search-div` is nested directly below `.search-results-title`, which has `display: inline-flex`. This makes the crate-search-div a [flex item], which makes its display property irrelevant, because flex items have their display [blockified] in any case.

[flex item]: https://developer.mozilla.org/en-US/docs/Glossary/Flex_Item
[blockified]: https://www.w3.org/TR/css-flexbox-1/#flex-items

Author: matthiaskrgr