Fixed unused import, added change log

CHANGES

@@ -0,0 +1,7 @@
+Version 0.1
+-----------
+ - 0.1.4 - Multiprocessing
+ - 0.1.3 - Blueprint support
+ - 0.1.1 - 0.1.2 - Struggling to update pypi via CI
+
+Released to public.

sanic/sanic.py

@@ -1,4 +1,3 @@
-from argparse import ArgumentParser
 from asyncio import get_event_loop
 from inspect import isawaitable
 from multiprocessing import Process, Event