remove unnecessary code

src/main/java/de/umr/nosql/cola/ColaImpl.java

@@ -86,58 +86,6 @@ public class ColaImpl implements COLAInsert<Integer, String> {
         return mergedArray;
     }
 
-
-    public static ColaElement[] merge_sort(ColaElement[] unsortedArray)
-    {
-        if (unsortedArray.length > 1) {
-            int mid = unsortedArray.length / 2;
-            ColaElement[] left = new ColaElement[mid];
-            for (int i = 0; i <= mid - 1; i++){
-                left[i] = unsortedArray[i];
-            }
-            ColaElement[] right = new ColaElement[unsortedArray.length - mid];
-            for (int i = mid; i <= unsortedArray.length - 1; i++) {
-                right[i - mid] = unsortedArray[i];
-            }
-            left = merge_sort(left);
-            right = merge_sort(right);
-            return verschmelze(left, right);
-        }
-        else
-        {
-            return unsortedArray;
-        }
-    }
-
-    private static ColaElement[] verschmelze(ColaElement[] left, ColaElement[] right)
-    {
-        ColaElement[] newLeft = new ColaElement[left.length + right.length];
-        int indexLeft = 0;
-        int indexRight = 0;
-        int indexRes = 0;
-        while (indexLeft < left.length && indexRight < right.length) {
-            if (left[indexLeft].compareTo(right[indexRight]) < 0) {
-                newLeft[indexRes] = left[indexLeft];
-                indexLeft += 1;
-            } else {
-                newLeft[indexRes] = right[indexRight];
-                indexRight += 1;
-            }
-            indexRes += 1;
-        }
-        while (indexLeft < left.length) {
-            newLeft[indexRes] = left[indexLeft];
-            indexLeft += 1;
-            indexRes += 1;
-        }
-        while (indexRight < right.length) {
-            newLeft[indexRes] = right[indexRight];
-            indexRight += 1;
-            indexRes += 1;
-        }
-        return newLeft;
-    }
-
     public static void main(String[] args) {
         COLAInsert<Integer, String> colaInsert = new ColaImpl();
         colaInsert.insertElement(1, "a");