[vte] widget: gtk4: Make background API available on gtk4

[Christian Persch <chpe src gnome org>]

commit 011b7acc60b71ea4762544ee72d106c3bccfa131
Author: Christian Persch <chpe src gnome org>
Date:   Fri Jul 22 21:39:12 2022 +0200

    widget: gtk4: Make background API available on gtk4
    
    https://gitlab.gnome.org/GNOME/vte/-/issues/12#note_1506942

 src/vte/vteterminal.h | 4 ----
 src/vtegtk.cc         | 4 ----
 2 files changed, 8 deletions(-)
---
diff --git a/src/vte/vteterminal.h b/src/vte/vteterminal.h
index 43d4f920..c71658d2 100644
--- a/src/vte/vteterminal.h
+++ b/src/vte/vteterminal.h
@@ -526,8 +526,6 @@ gboolean vte_terminal_get_input_enabled (VteTerminal *terminal) _VTE_CXX_NOEXCEP
 
 /* rarely useful functions */
 
-#if _VTE_GTK == 3
-
 _VTE_PUBLIC
 void vte_terminal_set_clear_background(VteTerminal* terminal,
                                        gboolean setting) _VTE_CXX_NOEXCEPT _VTE_GNUC_NONNULL(1);
@@ -535,8 +533,6 @@ _VTE_PUBLIC
 void vte_terminal_get_color_background_for_draw(VteTerminal* terminal,
                                                 GdkRGBA* color) _VTE_CXX_NOEXCEPT _VTE_GNUC_NONNULL(1, 2);
 
-#endif /* _VTE_GTK == 3 */
-
 /* Writing contents out */
 _VTE_PUBLIC
 gboolean vte_terminal_write_contents_sync (VteTerminal *terminal,
diff --git a/src/vtegtk.cc b/src/vtegtk.cc
index 4eb92487..f12ee256 100644
--- a/src/vtegtk.cc
+++ b/src/vtegtk.cc
@@ -6201,8 +6201,6 @@ catch (...)
         return vte::glib::set_error_from_exception(error);
 }
 
-#if VTE_GTK == 3
-
 /**
  * vte_terminal_set_clear_background:
  * @terminal: a #VteTerminal
@@ -6269,8 +6267,6 @@ catch (...)
         *color = {0., 0., 0., 1.};
 }
 
-#endif /* VTE_GTK == 3 */
-
 /**
  * vte_terminal_set_enable_sixel:
  * @terminal: a #VteTerminal