[ot-font] Remove unused 'post' table include for now

To make a release...

src/hb-ot-font.cc

diff --git a/src/hb-ot-font.cc b/src/hb-ot-font.cc
index 8b62bb1..39fc849 100644
--- a/src/hb-ot-font.cc
+++ b/src/hb-ot-font.cc
@@ -36,7 +36,7 @@
 #include "hb-ot-hhea-table.hh"
 #include "hb-ot-hmtx-table.hh"
 #include "hb-ot-os2-table.hh"
-#include "hb-ot-post-table.hh"
+//#include "hb-ot-post-table.hh"
 
 
 struct hb_ot_face_metrics_accelerator_t