Remove redundant #include path component.

Using the parent '../' path component in #include statements makes
the codebase more rigid and is redundant due to proper -I use.

Signed-off-by: Jon A. Cruz <jonc@osg.samsung.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
diff --git a/desktop-shell/shell.c b/desktop-shell/shell.c
index 925a676..3793614 100644
--- a/desktop-shell/shell.c
+++ b/desktop-shell/shell.c
@@ -38,7 +38,7 @@
 #include "shell.h"
 #include "desktop-shell-server-protocol.h"
 #include "workspaces-server-protocol.h"
-#include "../shared/config-parser.h"
+#include "shared/config-parser.h"
 #include "xdg-shell-server-protocol.h"
 
 #define DEFAULT_NUM_WORKSPACES 1