Remove xkbcommon support.

ui/events/BUILD.gn

Index: ui/events/BUILD.gn
diff --git a/ui/events/BUILD.gn b/ui/events/BUILD.gn
index e0994544f466a49e1bdc65c9c2eef4f7458ff6cd..3fb3a86f661d843e125ee130b65c5b67aea6de5c 100644
--- a/ui/events/BUILD.gn
+++ b/ui/events/BUILD.gn
@@ -4,7 +4,6 @@
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
-import("//ui/events/xkb.gni")
 
 static_library("dom_keycode_converter") {
   sources = [
@@ -72,7 +71,7 @@ component("events_base") {
     deps += [ "//ui/gfx/x" ]
   }
 
-  if (use_x11 || use_xkbcommon) {
+  if (use_x11) {
     sources += [
       "keycodes/keyboard_code_conversion_xkb.cc",
       "keycodes/keyboard_code_conversion_xkb.h",
@@ -315,7 +314,7 @@ test("events_unittests") {
       "ozone/evdev/touch_event_converter_evdev_unittest.cc",
       "ozone/evdev/touch_noise/touch_noise_finder_unittest.cc",
     ]
-    if (use_x11 || use_xkbcommon) {
+    if (use_x11) {
       sources += [ "ozone/layout/xkb/xkb_keyboard_layout_engine_unittest.cc" ]
     }
     deps += [