Remove xkbcommon support.

ui/events/ozone/BUILD.gn

Index: ui/events/ozone/BUILD.gn
diff --git a/ui/events/ozone/BUILD.gn b/ui/events/ozone/BUILD.gn
index 7ee8ce453d745197884b0b0882c225e07a4ea056..9f2d016ee09ebbdf3cbfb0c1b2ec041746264175 100644
--- a/ui/events/ozone/BUILD.gn
+++ b/ui/events/ozone/BUILD.gn
@@ -3,15 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
-import("//build/config/linux/pkg_config.gni")
 import("//build/config/ui.gni")
-import("//ui/events/xkb.gni")
-
-if (use_xkbcommon) {
-  pkg_config("xkbcommon") {
-    packages = [ "xkbcommon" ]
-  }
-}
 
 component("events_ozone") {
   sources = [
@@ -124,12 +116,6 @@ component("events_ozone_evdev") {
   public_configs = [ ":evdev" ]
 }
 
-config("events_ozone_layout_config") {
-  if (use_xkbcommon) {
-    defines = [ "USE_XKBCOMMON" ]
-  }
-}
-
 component("events_ozone_layout") {
   sources = [
     "layout/events_ozone_layout_export.h",
@@ -152,6 +138,4 @@ component("events_ozone_layout") {
     "//ui/events:events_base",
     "//ui/ozone:ozone_base",
   ]
-
-  public_configs = [ ":events_ozone_layout_config" ]
 }