libdrgn/python: remove dead misspelled ifdef block

Alec Rivers noticed in #461 that WITH_LIBKDUMPFILE is misspelled as
WITH_KDUMPFILE here. The whole ifdef block isn't actually needed, so
remove it.

Fixes: 4e330bb ("cli: indicate if drgn was compiled with libkdumpfile")
Signed-off-by: Omar Sandoval <osandov@osandov.com>

libdrgn/python/main.c

@@ -2,9 +2,6 @@
 // SPDX-License-Identifier: LGPL-2.1-or-later
 
 #include <elfutils/libdwfl.h>
-#ifdef WITH_KDUMPFILE
-#include <libkdumpfile/kdumpfile.h>
-#endif
 
 #include "drgnpy.h"
 #include "../path.h"