Do not create new bootloader stack as it is not needed any longer and kernel will use its own stack

xtldr/includes/xtbl.h

@@ -72,12 +72,6 @@ XTCDECL
 LOADER_MEMORY_TYPE
 BlConvertEfiMemoryType(IN EFI_MEMORY_TYPE EfiMemoryType);
 
-XTCDECL
-VOID
-BlCreateStack(IN PVOID *StackPtr,
-              IN ULONG StackSize,
-              IN PVOID Callback);
-
 XTCDECL
 VOID
 BlDbgPrint(IN PUINT16 Format,
@@ -137,10 +131,6 @@ XTCDECL
 EFI_STATUS
 BlGetMemoryMap(OUT PEFI_MEMORY_MAP MemoryMap);
 
-XTCDECL
-VOID
-BlGetStackPointer(OUT PVOID *Stack);
-
 XTCDECL
 EFI_STATUS
 BlGetVirtualAddress(IN PLIST_ENTRY MemoryMappings,
@@ -185,10 +175,6 @@ XTCDECL
 EFI_STATUS
 BlRegisterXtLoaderProtocol();
 
-XTCDECL
-EFI_STATUS
-BlStartNewStack();
-
 XTCDECL
 EFI_STATUS
 BlStartXtLoader(IN EFI_HANDLE ImageHandle,