servo: Merge #6788 - Remove unused StyledNode::has_style method (from Ms2ger:has_style); r=SimonSapin

Source-Repo: https://github.com/servo/servo
Source-Revision: 662c00a8109c49d4c57343156b774441f4f48640

servo/components/layout/css/node_style.rs

@@ -18,8 +18,6 @@ pub trait StyledNode {
     /// Returns the style results for the given node. If CSS selector matching has not yet been
     /// performed, fails.
     fn style<'a>(&'a self) -> Ref<'a, Arc<ComputedValues>>;
-    /// Does this node have a computed style yet?
-    fn has_style(&self) -> bool;
     /// Removes the style from this node.
     fn unstyle(self);
 }
@@ -42,11 +40,6 @@ impl<'ln> StyledNode for ThreadSafeLayoutNode<'ln> {
         })
     }
 
-    fn has_style(&self) -> bool {
-        let layout_data_ref = self.borrow_layout_data();
-        layout_data_ref.as_ref().unwrap().shared_data.style.is_some()
-    }
-
     fn unstyle(self) {
         let mut layout_data_ref = self.mutate_layout_data();
         let layout_data = layout_data_ref.as_mut().expect("no layout data");