Rollup merge of #34105 - ollie27:rustdoc_derived, r=alexcrichton

rustdoc: Remove Derived Implementations title

As far as I know whether a trait was derived or not does not change the
public API so there is no need to include this information in the docs.

This title currently just adds an extra divide in the list of trait
implementations which I don't think needs to be there.

1 files changed, 1 insertions, 16 deletions

diff --git a/src/librustdoc/html/render.rs b/src/librustdoc/html/render.rs
index f63d37b3403..21463527ab9 100644
--- a/src/librustdoc/html/render.rs
+++ b/src/librustdoc/html/render.rs
@@ -399,7 +399,6 @@ fn init_ids() -> HashMap<String, usize> {
      "methods",
      "deref-methods",
      "implementations",
-     "derived_implementations"
      ].into_iter().map(|id| (String::from(*id), 1)).collect()
 }
 
@@ -2524,25 +2523,11 @@ fn render_assoc_items(w: &mut fmt::Formatter,
         }
         write!(w, "<h2 id='implementations'>Trait \
                    Implementations</h2>")?;
-        let (derived, manual): (Vec<_>, Vec<&Impl>) = traits.iter().partition(|i| {
-            i.inner_impl().derived
-        });
-        for i in &manual {
+        for i in &traits {
             let did = i.trait_did().unwrap();
             let assoc_link = AssocItemLink::GotoSource(did, &i.inner_impl().provided_trait_methods);
             render_impl(w, cx, i, assoc_link, true, containing_item.stable_since())?;
         }
-        if !derived.is_empty() {
-            write!(w, "<h3 id='derived_implementations'>\
-                           Derived Implementations \
-                       </h3>")?;
-            for i in &derived {
-                let did = i.trait_did().unwrap();
-                let assoc_link = AssocItemLink::GotoSource(did,
-                                                           &i.inner_impl().provided_trait_methods);
-                render_impl(w, cx, i, assoc_link, true, containing_item.stable_since())?;
-            }
-        }
     }
     Ok(())
 }