Remove unnecessary import

SabineHaas · SabineHaas · commit e771d86d1090 · 2018-03-14T11:05:54.000+01:00
diff --git a/windpowerlib/power_output.py b/windpowerlib/power_output.py
@@ -9,7 +9,6 @@
 
 import numpy as np
 import pandas as pd
-from windpowerlib import tools
 
 
 def power_coefficient_curve(wind_speed, power_coefficient_curve_wind_speeds,
