[balsa/gtk4] Various: Remove mentions of cell-renderer-button

[Peter Bloomfield <peterb src gnome org>]

commit 7f3eea41005ddb36a9be1d1bf2525089695bdca5
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Thu Sep 24 15:43:32 2020 -0400

    Various: Remove mentions of cell-renderer-button

 libbalsa/Makefile.am    | 2 --
 libbalsa/address-view.c | 1 -
 libbalsa/meson.build    | 2 --
 3 files changed, 5 deletions(-)
---
diff --git a/libbalsa/Makefile.am b/libbalsa/Makefile.am
index 845cd1990..2792472d0 100644
--- a/libbalsa/Makefile.am
+++ b/libbalsa/Makefile.am
@@ -34,8 +34,6 @@ libbalsa_a_SOURCES =          \
        autocrypt.c                             \
        body.c                  \
        body.h                  \
-       cell-renderer-button.c  \
-       cell-renderer-button.h  \
        completion.c            \
        completion.h            \
        files.c                 \
diff --git a/libbalsa/address-view.c b/libbalsa/address-view.c
index 7c8dfc33f..162656ffe 100644
--- a/libbalsa/address-view.c
+++ b/libbalsa/address-view.c
@@ -38,7 +38,6 @@
  * LibBalsa includes.
  */
 #include "address-book.h"
-#include "cell-renderer-button.h"
 #include "misc.h"
 
 struct _LibBalsaAddressView {
diff --git a/libbalsa/meson.build b/libbalsa/meson.build
index c628b9935..24c37f76c 100644
--- a/libbalsa/meson.build
+++ b/libbalsa/meson.build
@@ -31,8 +31,6 @@ libbalsa_a_sources = [
   'autocrypt.c',
   'body.c',
   'body.h',
-  'cell-renderer-button.c',
-  'cell-renderer-button.h',
   'completion.c',
   'completion.h',
   'files.c',