Remove touch events from Sky

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 67414ca0f1c0212616f0af39e8db82bb8c73d3da..7c0322b6100c45d07bef061b1fc4d5ec98eb0354 100644
--- a/sky/engine/core/core.gni
+++ b/sky/engine/core/core.gni
@@ -516,10 +516,6 @@ sky_core_files = [
   "dom/Text.h",
   "dom/TextLinkColors.cpp",
   "dom/TextLinkColors.h",
-  "dom/Touch.cpp",
-  "dom/Touch.h",
-  "dom/TouchList.cpp",
-  "dom/TouchList.h",
   "dom/TreeScope.cpp",
   "dom/TreeScope.h",
   "dom/TreeScopeAdopter.cpp",
@@ -684,10 +680,6 @@ sky_core_files = [
   "events/TextEvent.h",
   "events/TextEventInputType.h",
   "events/ThreadLocalEventNames.h",
-  "events/TouchEvent.cpp",
-  "events/TouchEvent.h",
-  "events/TouchEventContext.cpp",
-  "events/TouchEventContext.h",
   "events/TransitionEvent.cpp",
   "events/TransitionEvent.h",
   "events/TreeScopeEventContext.cpp",
@@ -1268,8 +1260,6 @@ core_idl_files = get_path_info([
                                  "dom/RequestAnimationFrameCallback.idl",
                                  "dom/shadow/ShadowRoot.idl",
                                  "dom/Text.idl",
-                                 "dom/Touch.idl",
-                                 "dom/TouchList.idl",
                                  "dom/URL.idl",
                                  "editing/Selection.idl",
                                  "events/AnimationEvent.idl",
@@ -1289,7 +1279,6 @@ core_idl_files = get_path_info([
                                  "events/ProgressEvent.idl",
                                  "events/ResourceProgressEvent.idl",
                                  "events/TextEvent.idl",
-                                 "events/TouchEvent.idl",
                                  "events/TransitionEvent.idl",
                                  "events/UIEvent.idl",
                                  "frame/Console.idl",
@@ -1400,7 +1389,6 @@ core_event_idl_files = get_path_info([
                                        "events/ProgressEvent.idl",
                                        "events/ResourceProgressEvent.idl",
                                        "events/TextEvent.idl",
-                                       "events/TouchEvent.idl",
                                        "events/TransitionEvent.idl",
                                        "events/UIEvent.idl",
                                        "events/AnimationEvent.idl",