Disable build of parallel_code which doesn't compile any more due to missing starpu_sched_ctx_book/unbook_workers_for_task

examples/Makefile.am

@@ -336,10 +336,11 @@ STARPU_EXAMPLES +=				\
 	sched_ctx/nested_sched_ctxs		\
 	sched_ctx/sched_ctx_without_sched_policy_awake\
 	sched_ctx/parallel_tasks_reuse_handle
-if STARPU_LONG_CHECK
-STARPU_EXAMPLES +=				\
-	sched_ctx/parallel_code
-endif
+# FIXME: does not compile any more due to missing starpu_sched_ctx_book/unbook_workers_for_task
+#if STARPU_LONG_CHECK
+#STARPU_EXAMPLES +=				\
+#	sched_ctx/parallel_code
+#endif
 
 if STARPU_HAVE_HWLOC
 if STARPU_HWLOC_HAVE_TOPOLOGY_DUP