remove unused imports

freqtrade/optimize/backtesting.py

@@ -16,7 +16,6 @@ from freqtrade.misc import load_config
 from freqtrade.optimize import load_data, preprocess
 from freqtrade.persistence import Trade
 
-
 logger = logging.getLogger(__name__)
 
 

freqtrade/optimize/hyperopt.py

@@ -2,11 +2,9 @@
 
 
 import json
-
 from functools import reduce
 from math import exp
 from operator import itemgetter
-from pprint import pprint
 
 from hyperopt import fmin, tpe, hp, Trials, STATUS_OK
 from pandas import DataFrame