drm/amdgpu/display: remove unnecessary TODO spl_os_types.h

Remove unnecessary TODO from spl_os_types.h
Reviewed-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/spl/spl_os_types.h

@@ -18,7 +18,6 @@
  * general debug capabilities
  *
  */
-// TODO: need backport
 #define SPL_BREAK_TO_DEBUGGER() ASSERT(0)
 
 static inline uint64_t spl_div_u64_rem(uint64_t dividend, uint32_t divisor, uint32_t *remainder)