YANG uses and UT

Change-Id: Id3ec5cfed2b8e2a7d2d580786c70b5804f03ecfa
diff --git a/src/main/java/org/onosproject/yangutils/parser/impl/TreeWalkListener.java b/src/main/java/org/onosproject/yangutils/parser/impl/TreeWalkListener.java
index 51f3928..c1c84a1 100644
--- a/src/main/java/org/onosproject/yangutils/parser/impl/TreeWalkListener.java
+++ b/src/main/java/org/onosproject/yangutils/parser/impl/TreeWalkListener.java
@@ -52,8 +52,8 @@
 import org.onosproject.yangutils.parser.impl.listeners.MaxElementsListener;
 import org.onosproject.yangutils.parser.impl.listeners.MinElementsListener;
 import org.onosproject.yangutils.parser.impl.listeners.ModuleListener;
-import org.onosproject.yangutils.parser.impl.listeners.NotificationListener;
 import org.onosproject.yangutils.parser.impl.listeners.NamespaceListener;
+import org.onosproject.yangutils.parser.impl.listeners.NotificationListener;
 import org.onosproject.yangutils.parser.impl.listeners.OrganizationListener;
 import org.onosproject.yangutils.parser.impl.listeners.OutputListener;
 import org.onosproject.yangutils.parser.impl.listeners.PatternRestrictionListener;
@@ -1087,14 +1087,6 @@
     }
 
     @Override
-    public void enterInputStatementBody(GeneratedYangParser.InputStatementBodyContext ctx) {
-    }
-
-    @Override
-    public void exitInputStatementBody(GeneratedYangParser.InputStatementBodyContext ctx) {
-    }
-
-    @Override
     public void enterOutputStatement(GeneratedYangParser.OutputStatementContext ctx) {
         OutputListener.processOutputEntry(this, ctx);
     }
@@ -1105,14 +1097,6 @@
     }
 
     @Override
-    public void enterOutputStatementBody(GeneratedYangParser.OutputStatementBodyContext ctx) {
-    }
-
-    @Override
-    public void exitOutputStatementBody(GeneratedYangParser.OutputStatementBodyContext ctx) {
-    }
-
-    @Override
     public void enterNotificationStatement(GeneratedYangParser.NotificationStatementContext ctx) {
         NotificationListener.processNotificationEntry(this, ctx);
     }