Remove ui::KeyEvent::platform_keycode_

ui/events/event_utils.h

Index: ui/events/event_utils.h
diff --git a/ui/events/event_utils.h b/ui/events/event_utils.h
index 2913a3140b289bfc8b68de0a49a68fa52c0851ca..74884392a5e40acbbb6d4b7f60cc8a502c131d49 100644
--- a/ui/events/event_utils.h
+++ b/ui/events/event_utils.h
@@ -85,11 +85,6 @@ EVENTS_EXPORT KeyboardCode KeyboardCodeFromNative(
 // keyboard) from a native event.
 EVENTS_EXPORT DomCode CodeFromNative(const base::NativeEvent& native_event);
 
-// Returns the platform related key code (interpretation, not scan code).
-// For X11 and xkbcommon, this is the KeySym value.
-EVENTS_EXPORT uint32 PlatformKeycodeFromNative(
-    const base::NativeEvent& native_event);
-
 // Returns true if the keyboard event is a character event rather than
 // a keystroke event.
 EVENTS_EXPORT bool IsCharFromNative(const base::NativeEvent& native_event);