remove one indentation level

Signed-off-by: xizheyin <[email protected]>

Author: xizheyin

src/librustdoc/passes/strip_hidden.rs

@@ -89,8 +89,8 @@ impl DocFolder for Stripper<'_, '_> {
     fn fold_item(&mut self, i: Item) -> Option<Item> {
         let has_doc_hidden = i.is_doc_hidden();
 
-        if let clean::ImportItem(clean::Import { source, .. }) = &i.kind {
-            if let Some(source_did) = source.did
+        if let clean::ImportItem(clean::Import { source, .. }) = &i.kind
+            && let Some(source_did) = source.did
                 && let Some(import_def_id) = i.def_id().and_then(|def_id| def_id.as_local())
             {
                 let reexports = reexport_chain(self.tcx, import_def_id, source_did);
@@ -102,9 +102,8 @@ impl DocFolder for Stripper<'_, '_> {
                     .any(|reexport_did| self.tcx.is_doc_hidden(reexport_did))
                     || self.tcx.is_doc_hidden(source_did);
 
-                if has_hidden_source {
-                    return None;
-                }
+            if has_hidden_source {
+                return None;
             }
         }