Remove span method from AttributesExt trait

Author: GuillaumeGomez

src/librustdoc/clean/types.rs

@@ -878,10 +878,6 @@ pub(crate) trait AttributesExt {
 
     fn iter<'a>(&'a self) -> Self::Attributes<'a>;
 
-    fn span(&self) -> Option<rustc_span::Span> {
-        self.iter().find(|attr| attr.doc_str().is_some()).map(|attr| attr.span)
-    }
-
     fn cfg(&self, tcx: TyCtxt<'_>, hidden_cfg: &FxHashSet<Cfg>) -> Option<Arc<Cfg>> {
         let sess = tcx.sess;
         let doc_cfg_active = tcx.features().doc_cfg;

src/librustdoc/doctest.rs

@@ -1239,8 +1239,9 @@ impl<'a, 'hir, 'tcx> HirCollector<'a, 'hir, 'tcx> {
         if let Some(doc) = attrs.collapsed_doc_value() {
             // Use the outermost invocation, so that doctest names come from where the docs were written.
             let span = ast_attrs
-                .span()
-                .map(|span| span.ctxt().outer_expn().expansion_cause().unwrap_or(span))
+                .iter()
+                .find(|attr| attr.doc_str().is_some())
+                .map(|attr| attr.span.ctxt().outer_expn().expansion_cause().unwrap_or(attr.span))
                 .unwrap_or(DUMMY_SP);
             self.collector.set_position(span);
             markdown::find_testable_code(