[gedit-plugins] Remove support for Vala plugins

[Sébastien Wilmet <swilmet src gnome org>]

commit 0d09c36de6c694b2d2002569452644e6972554b6
Author: Sébastien Wilmet <swilmet informatique-libre be>
Date:   Mon Jul 18 05:14:02 2022 +0200

    Remove support for Vala plugins
    
    See previous commits.

 meson.build         | 6 +-----
 plugins/config.vapi | 6 ------
 plugins/meson.build | 5 -----
 3 files changed, 1 insertion(+), 16 deletions(-)
---
diff --git a/meson.build b/meson.build
index 1efe0ae..b8c760e 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project(
-  'gedit-plugins', 'c', # vala is added below if needed, with add_languages().
+  'gedit-plugins', 'c',
   version: '43.alpha',
   meson_version: '>= 0.50'
 )
@@ -80,10 +80,6 @@ if 'python' in extra_languages
   python3 = python.find_installation('python3')
 endif
 
-if 'vala' in extra_languages
-  add_languages('vala', required: true)
-endif
-
 subdir('po')
 subdir('plugins')
 subdir('help')
diff --git a/plugins/meson.build b/plugins/meson.build
index 3eb35fd..71422e3 100644
--- a/plugins/meson.build
+++ b/plugins/meson.build
@@ -25,11 +25,6 @@ configure_file(
   )
 )
 
-vapi_dir = join_paths(
-  srcdir,
-  'plugins',
-)
-
 foreach plugin_name : enabled_plugins
   subdir(plugin_name)
 endforeach