sdm: Use generic libdebug utility.

CRs-Fixed: 2211061
Change-Id: Ib949c40ff63a61a4476876c45357a40a702c9a01
diff --git a/libdrmutils/drm_master.cpp b/libdrmutils/drm_master.cpp
index ff7770b..f0d14b1 100644
--- a/libdrmutils/drm_master.cpp
+++ b/libdrmutils/drm_master.cpp
@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2017, The Linux Foundation. All rights reserved.
+* Copyright (c) 2017 - 2018, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
@@ -53,7 +53,6 @@
 
 namespace drm_utils {
 
-DRMLogger *DRMLogger::s_instance = nullptr;
 DRMMaster *DRMMaster::s_instance = nullptr;
 mutex DRMMaster::s_lock;