--- a/layout/style/ServoBindings.cpp
+++ b/layout/style/ServoBindings.cpp
@@ -2294,22 +2294,16 @@ Gecko_CSSValue_InitSharedList(nsCSSValue
   list->mHead = new nsCSSValueList;
   nsCSSValueList* cur = list->mHead;
   for (uint32_t i = 1; i < aLen; ++i) {
     cur->mNext = new nsCSSValueList;
     cur = cur->mNext;
   }
 }
 
-bool
-Gecko_PropertyId_IsPrefEnabled(nsCSSPropertyID id)
-{
-  return nsCSSProps::IsEnabled(id);
-}
-
 void
 Gecko_CSSValue_Drop(nsCSSValueBorrowedMut aCSSValue)
 {
   aCSSValue->~nsCSSValue();
 }
 
 void
 Gecko_nsStyleFont_SetLang(nsStyleFont* aFont, nsIAtom* aAtom)

--- a/layout/style/ServoBindings.h
+++ b/layout/style/ServoBindings.h
@@ -560,17 +560,16 @@ void Gecko_CSSValue_SetURL(nsCSSValueBor
 void Gecko_CSSValue_SetInt(nsCSSValueBorrowedMut css_value, int32_t integer, nsCSSUnit unit);
 void Gecko_CSSValue_SetPair(nsCSSValueBorrowedMut css_value,
                             nsCSSValueBorrowed xvalue, nsCSSValueBorrowed yvalue);
 void Gecko_CSSValue_SetList(nsCSSValueBorrowedMut css_value, uint32_t len);
 void Gecko_CSSValue_SetPairList(nsCSSValueBorrowedMut css_value, uint32_t len);
 void Gecko_CSSValue_InitSharedList(nsCSSValueBorrowedMut css_value, uint32_t len);
 void Gecko_CSSValue_Drop(nsCSSValueBorrowedMut css_value);
 NS_DECL_THREADSAFE_FFI_REFCOUNTING(nsCSSValueSharedList, CSSValueSharedList);
-bool Gecko_PropertyId_IsPrefEnabled(nsCSSPropertyID id);
 
 void Gecko_nsStyleFont_SetLang(nsStyleFont* font, nsIAtom* atom);
 void Gecko_nsStyleFont_CopyLangFrom(nsStyleFont* aFont, const nsStyleFont* aSource);
 void Gecko_nsStyleFont_FixupNoneGeneric(nsStyleFont* font,
                                         RawGeckoPresContextBorrowed pres_context);
 void Gecko_nsStyleFont_PrefillDefaultForGeneric(nsStyleFont* font,
                                                 RawGeckoPresContextBorrowed pres_context,
                                                 uint8_t generic_id);