diff --git a/src/main/java/telraam/logic/positioner/CircularQueue.java b/src/main/java/telraam/logic/positioner/CircularQueue.java
index 042ba79..94cadec 100644
--- a/src/main/java/telraam/logic/positioner/CircularQueue.java
+++ b/src/main/java/telraam/logic/positioner/CircularQueue.java
@@ -14,7 +14,7 @@ public CircularQueue(int maxSize) {
     @Override
     public boolean add(T e) {
         if (this.size >= this.maxSize) {
-            super.removeFirst();
+            removeFirst();
             this.size--;
         }
 
diff --git a/src/main/java/telraam/logic/positioner/Positioner.java b/src/main/java/telraam/logic/positioner/Positioner.java
index b61cdbf..4128b36 100644
--- a/src/main/java/telraam/logic/positioner/Positioner.java
+++ b/src/main/java/telraam/logic/positioner/Positioner.java
@@ -5,5 +5,4 @@
 public interface Positioner {
     void handle(Detection detection);
 
-    void calculatePositions();
 }