[sdf] Remove custom memory tracker.

The internal FreeType memory tracker is sufficient.

* src/sdf/ftsdf.c (FT_DEBUG_INNER, FT_ASSIGNP_INNER, SDF_MemoryUser,
sdf_alloc, sdf_free, SDF_ALLOC, SDF_FREE,
SDF_MEMORY_TRACKER_DECLARE, SDF_MEMORY_TRACKER_SETUP,
SDF_MEMORY_TRACKER_DONE): Removed.

s/SDF_ALLOC/FT_ALLOC/.
s/SDF_FREE/FT_FREE/.

Other updates.
2 files changed