Remove HTMLLinkElement

sky/engine/core/dom/StyleSheetCandidate.h

Index: sky/engine/core/dom/StyleSheetCandidate.h
diff --git a/sky/engine/core/dom/StyleSheetCandidate.h b/sky/engine/core/dom/StyleSheetCandidate.h
index 6fba5c06c6990bcae8237a3f9e088b0fd888a646..d6242edd75dfaf06d0268bc598d3d31168c43c7b 100644
--- a/sky/engine/core/dom/StyleSheetCandidate.h
+++ b/sky/engine/core/dom/StyleSheetCandidate.h
@@ -41,7 +41,6 @@ class StyleSheetCandidate {
     STACK_ALLOCATED();
 public:
     enum Type {
-        HTMLLink,
         HTMLStyle,
     };
 
@@ -50,11 +49,9 @@ public:
         , m_type(typeOf(node))
     { }
 
-    bool isImport() const;
     bool canBeActivated() const;
 
     StyleSheet* sheet() const;
-    Document* importedDocument() const;
 
 private:
     Node& node() const { return *m_node; }