Minor fix

* noticed when cleaning-up after merging into wxp branch

prasopes/drltools.py

@@ -12,7 +12,6 @@ import prasopes.datatools as dt
 import prasopes.graphtools as gt
 import prasopes.filetools as ft
 import prasopes.config as cf
-import prasopes.reactivitytools as rt
 import os.path
 import logging
 matplotlib.use("Qt5Agg")