Remove AAT's gcid/fmtx (#1099)

We are not going to use them, at least in the foreseeable future
diff --git a/src/Makefile.sources b/src/Makefile.sources
index 0bc9e58..9fa926d 100644
--- a/src/Makefile.sources
+++ b/src/Makefile.sources
@@ -93,8 +93,6 @@
 	hb-aat-layout-morx-table.hh \
 	hb-aat-layout-trak-table.hh \
 	hb-aat-layout-private.hh \
-	hb-aat-fmtx-table.hh \
-	hb-aat-gcid-table.hh \
 	hb-aat-ltag-table.hh \
 	hb-ot-font.cc \
 	hb-ot-layout.cc \
diff --git a/src/hb-aat-fmtx-table.hh b/src/hb-aat-fmtx-table.hh
deleted file mode 100644
index aa82c88..0000000
--- a/src/hb-aat-fmtx-table.hh
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * Copyright © 2018  Ebrahim Byagowi
- *
- *  This is part of HarfBuzz, a text shaping library.
- *
- * Permission is hereby granted, without written agreement and without
- * license or royalty fees, to use, copy, modify, and distribute this
- * software and its documentation for any purpose, provided that the
- * above copyright notice and the following two paragraphs appear in
- * all copies of this software.
- *
- * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
- * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
- * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
- * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
- * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- */
-
-#ifndef HB_AAT_FMTX_TABLE_HH
-#define HB_AAT_FMTX_TABLE_HH
-
-#include "hb-aat-layout-common-private.hh"
-
-/*
- * fmtx -- Font Metrics
- * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6fmtx.html
- */
-#define HB_AAT_TAG_fmtx HB_TAG('f','m','t','x')
-
-
-namespace AAT {
-
-
-struct fmtx
-{
-  static const hb_tag_t tableTag = HB_AAT_TAG_fmtx;
-
-  inline bool sanitize (hb_sanitize_context_t *c) const
-  {
-    TRACE_SANITIZE (this);
-    return_trace (likely (c->check_struct (this)));
-  }
-
-  FixedVersion<>version;		/* Version (set to 0x00020000). */
-  HBUINT32	glyphIndex;		/* The glyph whose points represent the metrics. */
-  HBUINT8	horizontalBefore;	/* Point number for the horizontal ascent. */
-  HBUINT8	horizontalAfter;	/* Point number for the horizontal descent. */
-  HBUINT8	horizontalCaretHead;	/* Point number for the horizontal caret head. */
-  HBUINT8	horizontalCaretBase;	/* Point number for the horizontal caret base. */
-  HBUINT8	verticalBefore;		/* Point number for the vertical ascent. */
-  HBUINT8	verticalAfter;		/* Point number for the vertical descent. */
-  HBUINT8	verticalCaretHead;	/* Point number for the vertical caret head. */
-  HBUINT8	verticalCaretBase;	/* Point number for the vertical caret base. */
-  public:
-  DEFINE_SIZE_STATIC (16);
-};
-
-} /* namespace AAT */
-
-
-#endif /* HB_AAT_FMTX_TABLE_HH */
diff --git a/src/hb-aat-gcid-table.hh b/src/hb-aat-gcid-table.hh
deleted file mode 100644
index b48a279..0000000
--- a/src/hb-aat-gcid-table.hh
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * Copyright © 2018  Ebrahim Byagowi
- *
- *  This is part of HarfBuzz, a text shaping library.
- *
- * Permission is hereby granted, without written agreement and without
- * license or royalty fees, to use, copy, modify, and distribute this
- * software and its documentation for any purpose, provided that the
- * above copyright notice and the following two paragraphs appear in
- * all copies of this software.
- *
- * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
- * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
- * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
- * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
- * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
- * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- */
-
-#ifndef HB_AAT_GCID_TABLE_HH
-#define HB_AAT_GCID_TABLE_HH
-
-#include "hb-aat-layout-common-private.hh"
-
-/*
- * gcid -- Glyphs CIDs
- * https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6gcid.html
- */
-#define HB_AAT_TAG_gcid HB_TAG('g','c','i','d')
-
-
-namespace AAT {
-
-
-struct gcid
-{
-  static const hb_tag_t tableTag = HB_AAT_TAG_gcid;
-
-  inline bool sanitize (hb_sanitize_context_t *c) const
-  {
-    TRACE_SANITIZE (this);
-    return_trace (likely (c->check_struct (this) && CIDs.sanitize (c)));
-  }
-
-  protected:
-  HBUINT16	version;	/* Version number (set to 0) */
-  HBUINT16	format;		/* Data format (set to 0) */
-  HBUINT32	size;		/* Size of the table, including header */
-  HBUINT16	registry;	/* The registry ID */
-  HBUINT8	registryName[64];
-				/* The registry name in ASCII */
-  HBUINT16	order;		/* The order ID */
-  HBUINT8	orderName[64];	/* The order name in ASCII */
-  HBUINT16	supplementVersion;
-				/* The supplement version */
-  ArrayOf<HBUINT16>
-		CIDs;		/* The CIDs for the glyphs in the font,
-				 * starting with glyph 0. If a glyph does not correspond
-				 * to a CID in the identified collection, 0xFFFF is used.
-				 * This should not exceed the number of glyphs in the font. */
-  public:
-  DEFINE_SIZE_ARRAY (144, CIDs);
-};
-
-} /* namespace AAT */
-
-
-#endif /* HB_AAT_GCID_TABLE_HH */
diff --git a/src/hb-aat-layout.cc b/src/hb-aat-layout.cc
index df6c38c..696dd35 100644
--- a/src/hb-aat-layout.cc
+++ b/src/hb-aat-layout.cc
@@ -36,8 +36,6 @@
 #include "hb-aat-layout-kerx-table.hh"
 #include "hb-aat-layout-morx-table.hh"
 #include "hb-aat-layout-trak-table.hh"
-#include "hb-aat-fmtx-table.hh" // Just so we compile it; unused otherwise.
-#include "hb-aat-gcid-table.hh" // Just so we compile it; unused otherwise.
 #include "hb-aat-ltag-table.hh" // Just so we compile it; unused otherwise.
 
 /*