diff --git a/components/style/gecko/generated/bindings.rs b/components/style/gecko/generated/bindings.rs
index 368623c3dd5..bd7d263e159 100644
--- a/components/style/gecko/generated/bindings.rs
+++ b/components/style/gecko/generated/bindings.rs
@@ -511,12 +511,6 @@ extern "C" {
 extern "C" {
     pub fn Servo_StyleSet_Drop(ptr: RawServoStyleSetOwned);
 }
-extern "C" {
-    pub fn Gecko_ChildrenCount(node: RawGeckoNodeBorrowed) -> u32;
-}
-extern "C" {
-    pub fn Gecko_NodeIsElement(node: RawGeckoNodeBorrowed) -> bool;
-}
 extern "C" {
     pub fn Gecko_IsInDocument(node: RawGeckoNodeBorrowed) -> bool;
 }
@@ -595,9 +589,6 @@ extern "C" {
 extern "C" {
     pub fn Gecko_DocumentState(aDocument: *const nsIDocument) -> u64;
 }
-extern "C" {
-    pub fn Gecko_IsTextNode(node: RawGeckoNodeBorrowed) -> bool;
-}
 extern "C" {
     pub fn Gecko_IsRootElement(element: RawGeckoElementBorrowed) -> bool;
 }
@@ -605,16 +596,9 @@ extern "C" {
     pub fn Gecko_MatchesElement(type_: CSSPseudoClassType,
                                 element: RawGeckoElementBorrowed) -> bool;
 }
-extern "C" {
-    pub fn Gecko_LocalName(element: RawGeckoElementBorrowed) -> *mut nsIAtom;
-}
 extern "C" {
     pub fn Gecko_Namespace(element: RawGeckoElementBorrowed) -> *mut nsIAtom;
 }
-extern "C" {
-    pub fn Gecko_GetElementId(element: RawGeckoElementBorrowed)
-     -> *mut nsIAtom;
-}
 extern "C" {
     pub fn Gecko_MatchLang(element: RawGeckoElementBorrowed,
                            override_lang: *mut nsIAtom,
@@ -1073,9 +1057,6 @@ extern "C" {
                                     type_: nsStyleContentType)
      -> *mut nsStyleContentData_CounterFunction;
 }
-extern "C" {
-    pub fn Gecko_GetNodeFlags(node: RawGeckoNodeBorrowed) -> u32;
-}
 extern "C" {
     pub fn Gecko_SetNodeFlags(node: RawGeckoNodeBorrowed, flags: u32);
 }
@@ -1105,10 +1086,6 @@ extern "C" {
                                      any_style_changed: *mut bool)
      -> nsChangeHint;
 }
-extern "C" {
-    pub fn Gecko_HintsHandledForDescendants(aHint: nsChangeHint)
-     -> nsChangeHint;
-}
 extern "C" {
     pub fn Gecko_GetElementSnapshot(table: *const ServoElementSnapshotTable,
                                     element: RawGeckoElementBorrowed)
diff --git a/components/style/gecko/restyle_damage.rs b/components/style/gecko/restyle_damage.rs
index b0f60663067..c5b10737d8e 100644
--- a/components/style/gecko/restyle_damage.rs
+++ b/components/style/gecko/restyle_damage.rs
@@ -100,15 +100,6 @@ impl GeckoRestyleDamage {
     pub fn reconstruct() -> Self {
         GeckoRestyleDamage(structs::nsChangeHint_nsChangeHint_ReconstructFrame)
     }
-
-    /// Assuming |self| is applied to an element, returns the set of damage that
-    /// would be superfluous to apply for descendants.
-    pub fn handled_for_descendants(self) -> Self {
-        let hint = unsafe {
-            bindings::Gecko_HintsHandledForDescendants(self.0)
-        };
-        GeckoRestyleDamage(hint)
-    }
 }
 
 impl Default for GeckoRestyleDamage {
diff --git a/components/style/servo/restyle_damage.rs b/components/style/servo/restyle_damage.rs
index 0be480a2424..1b7e4636e13 100644
--- a/components/style/servo/restyle_damage.rs
+++ b/components/style/servo/restyle_damage.rs
@@ -135,11 +135,6 @@ impl ServoRestyleDamage {
             }
         }
     }
-
-    /// Servo doesn't implement this optimization.
-    pub fn handled_for_descendants(self) -> Self {
-        Self::empty()
-    }
 }
 
 impl Default for ServoRestyleDamage {