remove brackets around boolean condition expression

Change-Id: Ia550d4603d9520ddea84a144e5e042903456d96d
Closes-Bug: 1405319
diff --git a/lib/horizon b/lib/horizon
index edb95e9..fee2ef0 100644
--- a/lib/horizon
+++ b/lib/horizon
@@ -72,7 +72,7 @@
 # cleanup_horizon() - Remove residual data files, anything left over from previous
 # runs that a clean run would need to clean up
 function cleanup_horizon {
-    if [[ is_fedora && $DISTRO =~ (rhel6) ]]; then
+    if is_fedora && [[ $DISTRO =~ (rhel6) ]]; then
         # If ``/usr/bin/node`` points into ``$DEST``
         # we installed it via ``install_nodejs``
         if [[ $(readlink -f /usr/bin/node) =~ ($DEST) ]]; then