update f8 linting

eNMS/models/administration.py

@@ -4,8 +4,7 @@
 from os import makedirs
 from os.path import exists, getmtime
 from passlib.hash import argon2
-from pathlib import Path
-from shutil import move, rmtree
+from shutil import move
 from sqlalchemy import Boolean, ForeignKey, Integer
 from sqlalchemy.orm import relationship
 from time import ctime

eNMS/models/inventory.py

@@ -1,6 +1,5 @@
 from re import search, sub
 from sqlalchemy import and_, Boolean, event, ForeignKey, Integer, or_
-from sqlalchemy.sql.expression import literal
 from sqlalchemy.ext.associationproxy import association_proxy
 from sqlalchemy.orm import backref, deferred, relationship
 from sqlalchemy.schema import UniqueConstraint