[GPOS] Merge fixing of offsets for cursive and mark attachments

Part of fixing https://github.com/behdad/harfbuzz/issues/211
diff --git a/src/hb-buffer-private.hh b/src/hb-buffer-private.hh
index 4983f84..c8eec3c 100644
--- a/src/hb-buffer-private.hh
+++ b/src/hb-buffer-private.hh
@@ -56,8 +56,7 @@
   HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII			= 0x00000001u,
   HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES		= 0x00000002u,
   HB_BUFFER_SCRATCH_FLAG_HAS_SPACE_FALLBACK		= 0x00000004u,
-  HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_CURSIVE		= 0x00000008u,
-  HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT		= 0x00000010u,
+  HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT		= 0x00000008u,
   /* Reserved for complex shapers' internal use. */
   HB_BUFFER_SCRATCH_FLAG_COMPLEX0			= 0x01000000u,
   HB_BUFFER_SCRATCH_FLAG_COMPLEX1			= 0x02000000u,