Fix types for numpy 1.20.0 upgrade

freqtrade/misc.py

@@ -9,7 +9,6 @@ from pathlib import Path
 from typing import Any
 from typing.io import IO
 
-import numpy as np
 import rapidjson
 
 
@@ -28,20 +27,6 @@ def shorten_date(_date: str) -> str:
     return new_date
 
 
-############################################
-# Used by scripts                          #
-# Matplotlib doesn't support ::datetime64, #
-# so we need to convert it into ::datetime #
-############################################
-def datesarray_to_datetimearray(dates: np.ndarray) -> np.ndarray:
-    """
-    Convert an pandas-array of timestamps into
-    An numpy-array of datetimes
-    :return: numpy-array of datetime
-    """
-    return dates.dt.to_pydatetime()
-
-
 def file_dump_json(filename: Path, data: Any, is_zip: bool = False, log: bool = True) -> None:
     """
     Dump JSON data into a file