remove sortedcontainer dependancy from swf_to_batsim file

.gitignore

 sched_input/*.json
 workload/*.swf
-<<<<<<< HEAD
 workload/*.json^(?!empty_workload$)
-=======
-workload/*.json
 .ipynb_checkpoints
 */__pycache__/
->>>>>>> 07389a942b276fb4ec631c8feccf1be6885e5e09

0_prepare_workload/swf_to_batsim_split_by_user.py

@@ -6,15 +6,8 @@ Split by user. Do not include the jobs profiles in the output JSON.
 (optional) keeps only a given set of partition.
 """
 
-# Dependency : sortedcontainers
-#    - installation: pip install sortedcontainers
-# Everything else should be in the standard library
-# Tested on cpython 3.4.3
-
-from sortedcontainers import SortedSet
 import argparse
 import json
-import math
 import re
 import sys
 import datetime