Cycles: Remove util_debug include from kernel code

Not sure why it was in there, all the debug flags stuff is to be handled outside
of kernel.

intern/cycles/kernel/kernel_compat_cpu.h

@@ -35,7 +35,6 @@
 #  define __NODES_FEATURES__ NODE_FEATURE_ALL
 #endif
 
-#include "util/util_debug.h"
 #include "util/util_math.h"
 #include "util/util_simd.h"
 #include "util/util_half.h"

intern/cycles/kernel/kernels/cpu/filter_cpu_impl.h

@@ -25,7 +25,6 @@
 #include "kernel/filter/filter_kernel.h"
 
 #ifdef KERNEL_STUB
-#  include "util/util_debug.h"
 #  define STUB_ASSERT(arch, name) assert(!(#name " kernel stub for architecture " #arch " was called!"))
 #endif
 

intern/cycles/kernel/kernels/cpu/kernel_cpu_impl.h

@@ -59,7 +59,6 @@
 #    include "kernel/split/kernel_buffer_update.h"
 #  endif  /* __SPLIT_KERNEL__ */
 #else
-#  include "util/util_debug.h"
 #  define STUB_ASSERT(arch, name) assert(!(#name " kernel stub for architecture " #arch " was called!"))
 
 #  ifdef __SPLIT_KERNEL__