[retro-plugins] build: Remove useless retro-plugins dependency

[Adrien Plazas <aplazas src gnome org>]

commit 79f7109dd839a2aa710faecb4d3c839b3587267b
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Tue Sep 13 08:14:25 2016 +0200

    build: Remove useless retro-plugins dependency

 configure.ac |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index c8da040..eab7894 100644
--- a/configure.ac
+++ b/configure.ac
@@ -16,10 +16,6 @@ m4_include([plugins/pc-engine/configure.ac])
 m4_include([plugins/playstation/configure.ac])
 m4_include([plugins/snes/configure.ac])
 
-PKG_CHECK_MODULES(RETRO_PLUGINS, [
-       retro-gobject-0.6
-])
-
 AC_CONFIG_FILES([
        Makefile
        plugins/Makefile