[gtk/remove-xim] Remove the XIM input method

[Emmanuele Bassi <ebassi src gnome org>]

commit a439be516151380092d90daa6e53f9f518e352f7
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sat Nov 16 21:05:25 2019 +0000

    Remove the XIM input method
    
    It's old and busted, and mostly broken in weird ways when it comes to
    extended input devices. All that XIM does, these days, is make a mess
    when people enable it by mistake.

 gtk/gtkimcontextxim.c | 1696 -------------------------------------------------
 gtk/gtkimcontextxim.h |   47 --
 gtk/gtkimmodule.c     |   11 -
 gtk/meson.build       |    1 -
 4 files changed, 1755 deletions(-)
---
diff --git a/gtk/gtkimmodule.c b/gtk/gtkimmodule.c
index a4c90dac13..2f4127faa7 100644
--- a/gtk/gtkimmodule.c
+++ b/gtk/gtkimmodule.c
@@ -42,7 +42,6 @@
 
 #ifdef GDK_WINDOWING_X11
 #include "x11/gdkx.h"
-#include "gtkimcontextxim.h"
 #endif
 
 #ifdef GDK_WINDOWING_WAYLAND
@@ -126,13 +125,6 @@ match_backend (GdkDisplay *display,
     return FALSE;
 #endif
 
-  if (g_strcmp0 (context_id, "xim") == 0)
-#ifdef GDK_WINDOWING_X11
-    return GDK_IS_X11_DISPLAY (display);
-#else
-    return FALSE;
-#endif
-
   if (g_strcmp0 (context_id, "ime") == 0)
 #ifdef GDK_WINDOWING_WIN32
     return GDK_IS_WIN32_DISPLAY (display);
@@ -270,9 +262,6 @@ gtk_im_modules_init (void)
   gtk_im_module_ensure_extension_point ();
 
   g_type_ensure (gtk_im_context_simple_get_type ());
-#ifdef GDK_WINDOWING_X11
-  g_type_ensure (gtk_im_context_xim_get_type ());
-#endif
 #ifdef GDK_WINDOWING_WAYLAND
   g_type_ensure (gtk_im_context_wayland_get_type ());
 #endif
diff --git a/gtk/meson.build b/gtk/meson.build
index bdfb7294b7..c083509f47 100644
--- a/gtk/meson.build
+++ b/gtk/meson.build
@@ -748,7 +748,6 @@ endif
 
 if x11_enabled
   gtk_sources += ['gtkapplication-x11.c', 'gtkmountoperation-x11.c']
-  gtk_sources += ['gtkimcontextxim.c']
 endif
 
 if wayland_enabled