Rollup merge of #93391 - notriddle:notriddle/remove-srclink-tooltip, r=jsha,GuillaumeGomez

rustdoc: remove tooltip from source link

This made more sense back when it was abbreviated, but now it seems redundant.

src/librustdoc/html/render/mod.rs

@@ -182,7 +182,7 @@ impl StylePath {
 
 fn write_srclink(cx: &Context<'_>, item: &clean::Item, buf: &mut Buffer) {
     if let Some(l) = cx.src_href(item) {
-        write!(buf, "<a class=\"srclink\" href=\"{}\" title=\"goto source code\">source</a>", l)
+        write!(buf, "<a class=\"srclink\" href=\"{}\">source</a>", l)
     }
 }