[gnome-calendar] build: don't try to generate a Makefile from a non-existant Makefile.am

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit ea4fdbc05b67707a3e6f61e05d854d79152e60f6
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Wed Jan 21 10:19:29 2015 -0200

    build: don't try to generate a Makefile from a non-existant Makefile.am

 configure.ac |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index af7594e..7cea1bb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -105,7 +105,6 @@ AC_CONFIG_FILES([
       data/Makefile
       data/org.gnome.Calendar.desktop.in
       data/icons/Makefile
-      data/appdata/Makefile
       po/Makefile.in
 ])