[network-manager-applet] build: fix build after "applet: don't check for gnome shell (bgo #707953)"

[Dan Williams <dcbw src gnome org>]

commit 2014927869cb92be2c9e360f1a6a4b118b866403
Author: Dan Williams <dcbw redhat com>
Date:   Mon Nov 24 10:54:16 2014 -0600

    build: fix build after "applet: don't check for gnome shell (bgo #707953)"
    
    Build breakage was my fault (dcbw), not Pavel's.
    
    fixes: 4473e6a48fcfda1d87d4a4bc9f5c0589235dcfe0

 src/Makefile.am |    4 +---
 1 files changed, 1 insertions(+), 3 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index d8c1238..0e85dd5 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -69,9 +69,7 @@ nm_applet_SOURCES = \
        applet-device-bridge.c \
        applet-device-infiniband.h \
        applet-device-infiniband.c \
-       fallback-icon.h \
-       shell-watcher.h \
-       shell-watcher.c
+       fallback-icon.h
 
 nm_applet_LDADD = \
        -lm \