[grilo] build: Fix silent rules

[Juan A. Suarez Romero <jasuarez src gnome org>]

commit f26b61d530a3608099f3ce62396a08308ec9c3bb
Author: Juan A. Suarez Romero <jasuarez igalia com>
Date:   Sun Jun 16 23:30:25 2013 +0000

    build: Fix silent rules
    
    Remove silent.m4 file and use the system one.

 Makefile.am  |    2 +-
 m4/silent.m4 |   27 ---------------------------
 2 files changed, 1 insertions(+), 28 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 3c9cd0e..c404759 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -45,7 +45,7 @@ MAINTAINERCLEANFILES = \
 
 DISTCLEANFILES = $(MAINTAINERCLEANFILES)
 
-EXTRA_DIST = ./m4/introspection.m4 ./m4/silent.m4
+EXTRA_DIST = ./m4/introspection.m4
 
 DISTCHECK_CONFIGURE_FLAGS=--enable-gtk-doc