servo: Merge #2555 - Eliminate some warnings (from brson:warnings); r=metajack

Depends on https://github.com/mozilla-servo/rust-fontconfig/pull/19, https://github.com/mozilla-servo/rust-harfbuzz/pull/21, https://github.com/mozilla-servo/rust-hubbub/pull/23, https://github.com/mozilla-servo/rust-layers/pull/68, https://github.com/mozilla-servo/sharegl/pull/29, https://github.com/mozilla-servo/rust-mozjs/pull/85.

Source-Repo: https://github.com/servo/servo
Source-Revision: 246c9759bee9fa54a9167e9b08478446e80cd80f

servo/src/components/main/layout/block.rs

@@ -2012,7 +2012,7 @@ impl WidthAndMarginsComputer for AbsoluteNonReplaced {
             right,
             available_width,
             static_x_offset,
-            direction,
+            ..
         } = input;
 
         // TODO: Check for direction of parent flow (NOT Containing Block)
@@ -2161,7 +2161,7 @@ impl WidthAndMarginsComputer for AbsoluteReplaced {
             right,
             available_width,
             static_x_offset,
-            direction,
+            ..
         } = input;
         // TODO: Check for direction of static-position Containing Block (aka
         // parent flow, _not_ the actual Containing Block) when right-to-left

servo/src/components/script/dom/node.rs

@@ -1276,7 +1276,7 @@ impl Node {
         // Step 6.
         if clone_children == CloneChildren {
             for ref child in node.children() {
-                let mut child_copy = Node::clone(&*child, Some(&*document), clone_children).root();
+                let child_copy = Node::clone(&*child, Some(&*document), clone_children).root();
                 let _inserted_node = Node::pre_insert(&*child_copy, &*copy, None);
             }
         }