Removed deprecated methods from Krill class

Change-Id: I1338e81e8de41413c3ab6dc0c013e0690a29ab45
diff --git a/src/main/java/de/ids_mannheim/korap/KrillQuery.java b/src/main/java/de/ids_mannheim/korap/KrillQuery.java
index d12e473..fb7ae74 100644
--- a/src/main/java/de/ids_mannheim/korap/KrillQuery.java
+++ b/src/main/java/de/ids_mannheim/korap/KrillQuery.java
@@ -137,6 +137,17 @@
 
 
     /**
+     * The index field associated with
+     * the token stream.
+     */
+    public String getField () {
+        if (field == null)
+            return "tokens";
+        return this.field;
+    };
+
+
+    /**
      * <p>Deserialize JSON-LD query to a {@link SpanQueryWrapper}
      * object.</p>
      *