ANDROID: mm: Remove direct reclaim tracepoint exports

The memhealth driver has been removed from AOSP. We no longer need the
direct reclaim begin/end tracepoints to be exported.

Bug: 315560026
Change-Id: Iadcebc7d81eb6cc059c318918fba8664e5ae37b8
Signed-off-by: Carlos Galo <carlosgalo@google.com>

Author: Carlos Galo

mm/vmscan.c

@@ -7130,13 +7130,6 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
 	return nr_reclaimed;
 }
 
-/**
- * ANDROID: Exporting tracepoints to assist in tracking direct reclaim
- * state in `drivers/android/memhealth.c`.
- */
-EXPORT_TRACEPOINT_SYMBOL_GPL(mm_vmscan_direct_reclaim_begin);
-EXPORT_TRACEPOINT_SYMBOL_GPL(mm_vmscan_direct_reclaim_end);
-
 #ifdef CONFIG_MEMCG
 
 /* Only used by soft limit reclaim. Do not reuse for anything else. */