Remove custom style building for -webkit-font-feature-settings.

Source/platform/fonts/FontDescription.cpp

Index: Source/platform/fonts/FontDescription.cpp
diff --git a/Source/platform/fonts/FontDescription.cpp b/Source/platform/fonts/FontDescription.cpp
index 7c45aea2db23f673e9609a554659d1c26bce974a..1022de52bfffeaa821fd6526c297b0aaf68b7cdd 100644
--- a/Source/platform/fonts/FontDescription.cpp
+++ b/Source/platform/fonts/FontDescription.cpp
@@ -131,13 +131,6 @@ void FontDescription::setVariantLigatures(const VariantLigatures& ligatures)
     updateTypesettingFeatures();
 }
 
-FontDescription FontDescription::makeNormalFeatureSettings() const
-{
-    FontDescription normalDescription(*this);
-    normalDescription.setFeatureSettings(nullptr);
-    return normalDescription;
-}
-
 float FontDescription::effectiveFontSize() const
 {
     float size = (RuntimeEnabledFeatures::subpixelFontScalingEnabled())