flake8 fix

freqtrade/optimize/hyperopt_loss/hyperopt_loss_sharpe.py

@@ -6,13 +6,13 @@ Hyperoptimization.
 """
 from datetime import datetime
 
-import numpy as np
 from pandas import DataFrame
 
 from freqtrade.optimize.hyperopt import IHyperOptLoss
 from freqtrade.constants import Config
 from freqtrade.data.metrics import calculate_sharpe
 
+
 class SharpeHyperOptLoss(IHyperOptLoss):
     """
     Defines the loss function for hyperopt.