[gnome-software] trivial: Fix make distcheck after the steam patch landed

[Richard Hughes <rhughes src gnome org>]

commit f9997d30b6cf4684709d0c0447fed0e0d75b6a9a
Author: Richard Hughes <richard hughsie com>
Date:   Thu Mar 3 18:05:41 2016 +0000

    trivial: Fix make distcheck after the steam patch landed

 src/plugins/Makefile.am |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/src/plugins/Makefile.am b/src/plugins/Makefile.am
index 1346420..7d5d8e5 100644
--- a/src/plugins/Makefile.am
+++ b/src/plugins/Makefile.am
@@ -247,7 +247,6 @@ check_PROGRAMS =                                    \
        gs-self-test
 
 gs_self_test_SOURCES =                                 \
-       gs-html-utils.c                                 \
        gs-moduleset.c                                  \
        gs-self-test.c