Rollup merge of #101507 - notriddle:notriddle/main-content-table-td, r=GuillaumeGomez

rustdoc: remove unused CSS `#main-content > table td`

This rule was added in 4e2c59a970 to benefit the module items table. However, the module items table stopped using table tags when 6020c79dde switched us over to grid layout.

You can see when this one used to be triggered by visiting <https://doc.rust-lang.org/1.54.0/alloc/slice/index.html#structs-1> in a very narrow window, but it doesn't any more, because the module table is now rendered using `<div>` tags.

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

@@ -2035,11 +2035,6 @@ in storage.js plus the media query with (min-width: 701px)
 		height: 73px;
 	}
 
-	#main-content > table td {
-		word-break: break-word;
-		width: 50%;
-	}
-
 	#crate-search {
 		border-radius: 4px;
 	}