CI: disable numpydev job
xref https://github.com/pandas-dev/pandas/issues/30043.
Will take some time to fix all these cases.
thanks @TomAugspurger  merge on green. grr
```
pandas/core/generic.py:9129: error: Item "None" of "Optional[DateOffset]" has no attribute "rule_code"
```
must be something i merged recently Fixing the mypy issue in https://github.com/pandas-dev/pandas/pull/30049/commits/dd6b8171e549b498cda4c5d532d0e9f30cc2b2a5. thanks @TomAugspurger 