EmbeddedPkg/TemplateRealTimeClockLib: drop LibRtcVirtualNotifyEvent

The RealTimeClockLib class header in edk2 mistakenly declares a function
called LibRtcVirtualNotifyEvent(). No component ever calls this function
crossing module boundaries; all RealTimeClockLib instances in edk2 and
edk2-platforms are supposed to register (and do register) their
SetVirtualAddressMap() notification functions.

In particular, TemplateRealTimeClockLib *itself* doesn't even use
LibRtcVirtualNotifyEvent() -- the function is defined with an empty body,
clearly in an understandable, but misguided, attempt, to conform to the
(bogus) library interface. Remove the function.

Build-tested only (with "EmbeddedPkg.dsc").

Cc: Abner Chang <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Daniel Schaefer <[email protected]>
Cc: Leif Lindholm <[email protected]>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=4564
Signed-off-by: Laszlo Ersek <[email protected]>
Message-Id: <[email protected]>
Reviewed-by: Ard Biesheuvel <[email protected]>

Author: Laszlo Ersek

EmbeddedPkg/Library/TemplateRealTimeClockLib/RealTimeClockLib.c

@@ -133,27 +133,3 @@ LibRtcInitialize (
   //
   return EFI_SUCCESS;
 }
-
-/**
-  Fixup internal data so that EFI can be call in virtual mode.
-  Call the passed in Child Notify event and convert any pointers in
-  lib to virtual mode.
-
-  @param[in]    Event   The Event that is being processed
-  @param[in]    Context Event Context
-**/
-VOID
-EFIAPI
-LibRtcVirtualNotifyEvent (
-  IN EFI_EVENT  Event,
-  IN VOID       *Context
-  )
-{
-  //
-  // Only needed if you are going to support the OS calling RTC functions in virtual mode.
-  // You will need to call EfiConvertPointer (). To convert any stored physical addresses
-  // to virtual address. After the OS transitions to calling in virtual mode, all future
-  // runtime calls will be made in virtual mode.
-  //
-  return;
-}