Remove support for loading remote font faces

sky/engine/core/core.gni

Index: sky/engine/core/core.gni
diff --git a/sky/engine/core/core.gni b/sky/engine/core/core.gni
index bce7c445ffaa153f251ea71419f42410f1c7b809..44c18dcd7279752d9cc881a7efa52c4e46f69806 100644
--- a/sky/engine/core/core.gni
+++ b/sky/engine/core/core.gni
@@ -119,15 +119,12 @@ sky_core_files = [
   "css/CSSCalculationValue.h",
   "css/CSSComputedStyleDeclaration.cpp",
   "css/CSSComputedStyleDeclaration.h",
-  "css/CSSCustomFontData.h",
   "css/CSSFilterValue.cpp",
   "css/CSSFilterValue.h",
   "css/CSSFontFace.cpp",
   "css/CSSFontFace.h",
   "css/CSSFontFaceSource.cpp",
   "css/CSSFontFaceSource.h",
-  "css/CSSFontFaceSrcValue.cpp",
-  "css/CSSFontFaceSrcValue.h",
   "css/CSSFontFeatureValue.cpp",
   "css/CSSFontFeatureValue.h",
   "css/CSSFontSelector.cpp",
@@ -189,20 +186,12 @@ sky_core_files = [
   "css/CSSValuePool.h",
   "css/DOMWindowCSS.cpp",
   "css/DOMWindowCSS.h",
-  "css/DocumentFontFaceSet.cpp",
-  "css/DocumentFontFaceSet.h",
   "css/ElementRuleCollector.cpp",
   "css/ElementRuleCollector.h",
   "css/FontFace.cpp",
   "css/FontFace.h",
   "css/FontFaceCache.cpp",
   "css/FontFaceCache.h",
-  "css/FontFaceSet.cpp",
-  "css/FontFaceSet.h",
-  "css/FontFaceSetLoadEvent.cpp",
-  "css/FontFaceSetLoadEvent.h",
-  "css/FontLoader.cpp",
-  "css/FontLoader.h",
   "css/FontSize.cpp",
   "css/FontSize.h",
   "css/HashTools.h",
@@ -237,8 +226,6 @@ sky_core_files = [
   "css/RGBColor.h",
   "css/Rect.cpp",
   "css/Rect.h",
-  "css/RemoteFontFaceSource.cpp",
-  "css/RemoteFontFaceSource.h",
   "css/RuleFeature.cpp",
   "css/RuleFeature.h",
   "css/RuleSet.cpp",
@@ -986,7 +973,6 @@ core_idl_files = get_path_info([
                                  "css/CSSMatrix.idl",
                                  "css/CSSStyleDeclaration.idl",
                                  "css/FontFace.idl",
-                                 "css/FontFaceSet.idl",
                                  "css/MediaQueryList.idl",
                                  "css/MediaQueryListEvent.idl",
                                  "dom/Attr.idl",
@@ -1082,7 +1068,6 @@ core_dart_files = get_path_info([
 core_dependency_idl_files = get_path_info([
                                             "animation/DocumentAnimation.idl",
                                             "animation/ElementAnimation.idl",
-                                            "css/DocumentFontFaceSet.idl",
                                             "dom/URLUtils.idl",
                                             "dom/URLUtilsReadOnly.idl",
                                             "events/EventListener.idl",
@@ -1093,7 +1078,6 @@ core_dependency_idl_files = get_path_info([
 
 # interfaces that inherit from Event, including Event itself
 core_event_idl_files = get_path_info([
-                                       "css/FontFaceSetLoadEvent.idl",
                                        "css/MediaQueryListEvent.idl",
                                        "events/AnimationEvent.idl",
                                        "events/AnimationPlayerEvent.idl",