Removing mypy to fix the nova CI

Just removing mypy and then we will revert this patch once
I035d6dc752eaa83105cc12797765b304d843e1f7 is merged.

Change-Id: Iaa02e9d35419bf7100cef1014217210c1d5b6855

Author: sbauza

tox.ini

@@ -54,7 +54,7 @@ envdir = {toxworkdir}/shared
 passenv =
   DISABLE_CHERRY_PICK_CHECK
 commands =
-  {[testenv:mypy]commands}
+  # {[testenv:mypy]commands}
   bash tools/flake8wrap.sh {posargs}
   # Check that all JSON files don't have \r\n in line.
   bash -c "! find doc/ -type f -name *.json | xargs grep -U -n $'\r'"