[at-spi2-core] Fix up last commit

[Mike Gorse <mgorse src gnome org>]

commit 975faea6f62ad12ec788b19cc5628e919d9bed4b
Author: Mike Gorse <mgorse suse com>
Date:   Thu Aug 4 16:25:44 2022 -0500

    Fix up last commit

 atk-adaptor/event.c | 2 +-
 atk/atkobject.c     | 2 +-
 atspi/meson.build   | 2 --
 3 files changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/atk-adaptor/event.c b/atk-adaptor/event.c
index 201962a2..ac682955 100644
--- a/atk-adaptor/event.c
+++ b/atk-adaptor/event.c
@@ -892,7 +892,7 @@ announcement_event_listener (GSignalInvocationHint * signal_hint,
                              const GValue * param_values, gpointer data)
 {
   AtkObject *accessible;
-  gchar *text;
+  const gchar *text;
   GSignalQuery signal_query;
   const gchar *name;
 
diff --git a/atk/atkobject.c b/atk/atkobject.c
index 8b6ad0c0..e5c7f922 100644
--- a/atk/atkobject.c
+++ b/atk/atkobject.c
@@ -689,7 +689,7 @@ atk_object_class_init (AtkObjectClass *klass)
   /**
    * AtkObject::announcement
    * @atkobject: the object which received the signal.
-   * @arg1: (type gchar *): the text to be announced.
+   * @arg1: the text to be announced.
    *
    * The "announcement" signal can be emitted to pass an announcement on to
    * be read by a screen reader.
diff --git a/atspi/meson.build b/atspi/meson.build
index 592ed0b3..bd8dbb19 100644
--- a/atspi/meson.build
+++ b/atspi/meson.build
@@ -7,7 +7,6 @@ atspi_sources = [
   'atspi-device.c',
   'atspi-device-legacy.c',
   'atspi-device-listener.c',
-  'atspi-device-mutter.c',
   'atspi-document.c',
   'atspi-editabletext.c',
   'atspi-event-listener.c',
@@ -40,7 +39,6 @@ atspi_headers = [
   'atspi-device.h',
   'atspi-device-legacy.h',
   'atspi-device-listener.h',
-  'atspi-device-mutter.h',
   'atspi-document.h',
   'atspi-editabletext.h',
   'atspi-event-listener.h',