Bump mypy to 1.0

mypy 1.0 no longer needs one "type: ignore" comment
that we have currently, which must be fixed to resolve
an unused-ignore error.

Depends-On: Ide07cf7f7c5175026f897e0a1686911c0c93da21
Change-Id: If2e7e94af0725421403ca8bfad0e5fdfd513ab12

cinder/volume/api.py

@@ -555,7 +555,7 @@ class API(base.Base):
                 if hasattr(e, 'msg'):
                     # ignore type (Exception has no attr "msg") error
                     msg = _("Unable to delete encryption key for "
-                            "volume: %s") % (e.msg)  # type: ignore
+                            "volume: %s") % (e.msg)
                 else:
                     msg = _("Unable to delete encryption key for volume.")
                 LOG.error(msg)

test-requirements.txt

@@ -18,5 +18,5 @@ SQLAlchemy-Utils>=0.37.8 # BSD License
 testtools>=2.4.0 # MIT
 
 doc8>=0.8.1 # Apache-2.0
-mypy>=0.981 # MIT
+mypy>=1.0 # MIT
 moto>=2.2.5 # Apache-2.0