rustdoc: remove unused HTML class="item-list"

Since 50f662e, there is no CSS or JS
targeting this class.

Author: notriddle

src/librustdoc/html/render/print_item.rs

@@ -890,7 +890,7 @@ fn item_trait(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean:
             w,
             "implementors",
             "Implementors",
-            "<div class=\"item-list\" id=\"implementors-list\">",
+            "<div id=\"implementors-list\">",
         );
         for implementor in concrete {
             render_implementor(cx, implementor, it, w, &implementor_dups, &[]);
@@ -902,7 +902,7 @@ fn item_trait(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean:
                 w,
                 "synthetic-implementors",
                 "Auto implementors",
-                "<div class=\"item-list\" id=\"synthetic-implementors-list\">",
+                "<div id=\"synthetic-implementors-list\">",
             );
             for implementor in synthetic {
                 render_implementor(
@@ -923,15 +923,15 @@ fn item_trait(w: &mut Buffer, cx: &mut Context<'_>, it: &clean::Item, t: &clean:
             w,
             "implementors",
             "Implementors",
-            "<div class=\"item-list\" id=\"implementors-list\"></div>",
+            "<div id=\"implementors-list\"></div>",
         );
 
         if t.is_auto(cx.tcx()) {
             write_small_section_header(
                 w,
                 "synthetic-implementors",
                 "Auto implementors",
-                "<div class=\"item-list\" id=\"synthetic-implementors-list\"></div>",
+                "<div id=\"synthetic-implementors-list\"></div>",
             );
         }
     }

src/test/rustdoc/impl-disambiguation.rs

@@ -4,13 +4,13 @@ pub trait Foo {}
 
 pub struct Bar<T> { field: T }
 
-// @has foo/trait.Foo.html '//*[@class="item-list"]//h3[@class="code-header"]' \
+// @has foo/trait.Foo.html '//*[@id="implementors-list"]//h3[@class="code-header"]' \
 //     "impl Foo for Bar<u8>"
 impl Foo for Bar<u8> {}
-// @has foo/trait.Foo.html '//*[@class="item-list"]//h3[@class="code-header"]' \
+// @has foo/trait.Foo.html '//*[@id="implementors-list"]//h3[@class="code-header"]' \
 //     "impl Foo for Bar<u16>"
 impl Foo for Bar<u16> {}
-// @has foo/trait.Foo.html '//*[@class="item-list"]//h3[@class="code-header"]' \
+// @has foo/trait.Foo.html '//*[@id="implementors-list"]//h3[@class="code-header"]' \
 //     "impl<'a> Foo for &'a Bar<u8>"
 impl<'a> Foo for &'a Bar<u8> {}
 
@@ -22,9 +22,9 @@ pub mod mod2 {
     pub enum Baz {}
 }
 
-// @has foo/trait.Foo.html '//*[@class="item-list"]//h3[@class="code-header"]' \
+// @has foo/trait.Foo.html '//*[@id="implementors-list"]//h3[@class="code-header"]' \
 //     "impl Foo for foo::mod1::Baz"
 impl Foo for mod1::Baz {}
-// @has foo/trait.Foo.html '//*[@class="item-list"]//h3[@class="code-header"]' \
+// @has foo/trait.Foo.html '//*[@id="implementors-list"]//h3[@class="code-header"]' \
 //     "impl<'a> Foo for &'a foo::mod2::Baz"
 impl<'a> Foo for &'a mod2::Baz {}

src/test/rustdoc/impl-parts.rs

@@ -7,6 +7,6 @@ pub struct Foo<T> { field: T }
 
 // @has impl_parts/struct.Foo.html '//*[@class="impl has-srclink"]//h3[@class="code-header"]' \
 //     "impl<T: Clone> !AnAutoTrait for Foo<T>where T: Sync,"
-// @has impl_parts/trait.AnAutoTrait.html '//*[@class="item-list"]//h3[@class="code-header"]' \
+// @has impl_parts/trait.AnAutoTrait.html '//*[@id="implementors-list"]//h3[@class="code-header"]' \
 //     "impl<T: Clone> !AnAutoTrait for Foo<T>where T: Sync,"
 impl<T: Clone> !AnAutoTrait for Foo<T> where T: Sync {}