Replace with this.clearAcl method

Change-Id: I8139446c5e2db3ac661073bd394ff5e8e07cf523
diff --git a/apps/acl/src/main/java/org/onosproject/acl/impl/AclManager.java b/apps/acl/src/main/java/org/onosproject/acl/impl/AclManager.java
index 2a5264e..19a4a96 100644
--- a/apps/acl/src/main/java/org/onosproject/acl/impl/AclManager.java
+++ b/apps/acl/src/main/java/org/onosproject/acl/impl/AclManager.java
@@ -157,9 +157,7 @@
     @Deactivate
     public void deactivate() {
         hostService.removeListener(hostListener);
-        // TODO can be replaced with this.clearAcl()
-        flowRuleService.removeFlowRulesById(appId);
-        aclStore.clearAcl();
+        this.clearAcl();
         log.info("Stopped");
     }