removing some TODOs

Change-Id: Ic98c811573a1b37813993eedddec512ec85729f3
diff --git a/apps/mobility/src/main/java/org/onosproject/mobility/HostMobility.java b/apps/mobility/src/main/java/org/onosproject/mobility/HostMobility.java
index 0aec81f..a28afdf 100644
--- a/apps/mobility/src/main/java/org/onosproject/mobility/HostMobility.java
+++ b/apps/mobility/src/main/java/org/onosproject/mobility/HostMobility.java
@@ -129,7 +129,7 @@
                     }
                 }
             }
-            //TODO: handle ip cleanup
+
             return flowRules;
         }