Disable advanced03-AF_XDP in main Makefile

Until issue #72 is resolved remove advanced03-AF_XDP from
the main/global Makefile.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>

Author: netoptimizer

Makefile

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
 
-LESSONS = $(wildcard basic*) $(wildcard packet*) $(wildcard tracing??-*) advanced03-AF_XDP
+LESSONS = $(wildcard basic*) $(wildcard packet*) $(wildcard tracing??-*)
 LESSONS_CLEAN = $(addsuffix _clean,$(LESSONS))
 
 .PHONY: clean $(LESSONS) $(LESSONS_CLEAN)