[pango/kill-ft-face] Deprecate some coverage api

[Matthias Clasen <matthiasc src gnome org>]

commit 703a9342a7a0816176004522b4818131b9ff72ef
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Jul 11 18:22:31 2019 -0400

    Deprecate some coverage api
    
    These parts are not used in Pango, and
    are not implemented on top of harfbuzz.

 pango/pango-coverage.c | 6 ++++++
 pango/pango-coverage.h | 6 +++---
 2 files changed, 9 insertions(+), 3 deletions(-)
---
diff --git a/pango/pango-coverage.c b/pango/pango-coverage.c
index f06517d4..3cfc0f09 100644
--- a/pango/pango-coverage.c
+++ b/pango/pango-coverage.c
@@ -172,6 +172,8 @@ pango_coverage_set (PangoCoverage     *coverage,
  * Set the coverage for each index in @coverage to be the max (better)
  * value of the current coverage for the index and the coverage for
  * the corresponding index in @other.
+ *
+ * Deprecated: 1.44: This function does nothing
  **/
 void
 pango_coverage_max (PangoCoverage *coverage,
@@ -187,6 +189,8 @@ pango_coverage_max (PangoCoverage *coverage,
  * @n_bytes: (out): location to store size of result
  *
  * Convert a #PangoCoverage structure into a flat binary format
+ *
+ * Deprecated: 1.44: This returns %NULL
  **/
 void
 pango_coverage_to_bytes (PangoCoverage  *coverage,
@@ -208,6 +212,8 @@ pango_coverage_to_bytes (PangoCoverage  *coverage,
  *
  * Return value: (transfer full) (nullable): a newly allocated
  *               #PangoCoverage, or %NULL if the data was invalid.
+ *
+ * Deprecated: 1.44: This returns %NULL
  **/
 PangoCoverage *
 pango_coverage_from_bytes (guchar *bytes,
diff --git a/pango/pango-coverage.h b/pango/pango-coverage.h
index 5fe81e02..60f7c057 100644
--- a/pango/pango-coverage.h
+++ b/pango/pango-coverage.h
@@ -74,15 +74,15 @@ PANGO_AVAILABLE_IN_ALL
 void               pango_coverage_set     (PangoCoverage      *coverage,
                                           int                 index_,
                                           PangoCoverageLevel  level);
-PANGO_AVAILABLE_IN_ALL
+PANGO_DEPRECATED_IN_1_44
 void               pango_coverage_max     (PangoCoverage      *coverage,
                                           PangoCoverage      *other);
 
-PANGO_AVAILABLE_IN_ALL
+PANGO_DEPRECATED_IN_1_44
 void           pango_coverage_to_bytes   (PangoCoverage  *coverage,
                                          guchar        **bytes,
                                          int            *n_bytes);
-PANGO_AVAILABLE_IN_ALL
+PANGO_DEPRECATED_IN_1_44
 PangoCoverage *pango_coverage_from_bytes (guchar         *bytes,
                                          int             n_bytes);
 PANGO_AVAILABLE_IN_1_44