[gnome-builder/wip/gtk4-port] libide/sourceview: remove IdeSourceViewMode

[Christian Hergert <chergert src gnome org>]

commit f9ec8429725786f23b9eb98a7ea158cc724b6209
Author: Christian Hergert <chergert redhat com>
Date:   Sat Mar 26 23:43:12 2022 -0700

    libide/sourceview: remove IdeSourceViewMode
    
    We won't be using modes going forward as we will need to implement
    shortcuts in a new way for GTK 4. Vim integration will come from
    GtkSourceView directly.

 src/libide/sourceview/ide-source-view-mode.c | 630 ---------------------------
 src/libide/sourceview/ide-source-view-mode.h |  53 ---
 src/libide/sourceview/meson.build            |   2 -
 3 files changed, 685 deletions(-)
---
diff --git a/src/libide/sourceview/meson.build b/src/libide/sourceview/meson.build
index ee3b3d142..0a5762098 100644
--- a/src/libide/sourceview/meson.build
+++ b/src/libide/sourceview/meson.build
@@ -12,7 +12,6 @@ libide_sourceview_generated_headers = []
 libide_sourceview_private_headers = [
   'ide-cursor.h',
   'ide-source-view-capture.h',
-  'ide-source-view-mode.h',
   'ide-source-view-movements.h',
   'ide-source-view-private.h',
 ]
@@ -39,7 +38,6 @@ libide_sourceview_private_sources = [
   'ide-cursor.c',
   'ide-line-change-gutter-renderer.c',
   'ide-source-view-capture.c',
-  'ide-source-view-mode.c',
   'ide-source-view-movements.c',
   'ide-source-view-shortcuts.c',
   'ide-text-util.c',