Update checkstyle to version 6.19

Change-Id: I32787f2a5f4f4b17fd4cdcf9bd2eb3903dcecfff
diff --git a/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/TopologyForDeviceAndLinkImpl.java b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/TopologyForDeviceAndLinkImpl.java
index 86d2a57..d36f608 100644
--- a/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/TopologyForDeviceAndLinkImpl.java
+++ b/protocols/isis/ctl/src/main/java/org/onosproject/isis/controller/impl/topology/TopologyForDeviceAndLinkImpl.java
@@ -273,14 +273,15 @@
             }
         }
         return isisRouter;
-    }/*
+    }
 
-    *//**
+    /**
      * Removes Device and Link instance.
      *
      * @param lsPdu ISIS LSPDU instance
      * @return isisRouter isisRouter instance
-     *//*
+     */
+    /*
     public IsisRouter removeDeviceAndLinkInfo(LsPdu lsPdu) {
         IsisRouter isisRouter = createIsisRouter(lsPdu);
         return isisRouter;
@@ -487,4 +488,4 @@
         }
         return isisLinkTed;
     }
-}
\ No newline at end of file
+}