reset_index without index name

Author: SabineHaas

windpowerlib/wind_turbine_cluster.py

@@ -222,6 +222,6 @@ def assign_power_curve(self, wake_losses_model='wind_farm_efficiency',
             df.interpolate(method='index').sum(axis=1))
         cluster_power_curve.columns = ['value']
         # Return wind speed (index) to a column of the data frame
-        cluster_power_curve.reset_index('wind_speed', inplace=True)
+        cluster_power_curve.reset_index(inplace=True)
         self.power_curve = cluster_power_curve
         return self