Remove duplicate class

app/src/test/java/ch/nuth/zhaw/exbox/ADS6_2_test.java

@@ -82,19 +82,3 @@ public class ADS6_2_test {
         assertEquals(count, s.length(), "size");
     }
 }
-
-class MyVisitor<T> implements Visitor<T> {
-    StringBuilder output;
-
-    MyVisitor() {
-        output = new StringBuilder();
-    }
-
-    public void visit(T s) {
-        output.append(s);
-    }
-
-    public String toString() {
-        return output.toString();
-    }
-}