TYP: remove mypy ignore[assignment] from pandas/core/internals/construction.py
Related to #37715
mypy ignore[assignment] was removed from pandas/core/internals/construction.py
Hi @MarcoGorelli, could you please take a look at this pr? let's ship it

if you're interested in typing, I'd highly suggest you take a look at https://github.com/pandas-dev/pandas-stubs - that affects the type hints which users get, there's plenty of really useful issues to work on there (and feel free to reach out to Irv if you're not sure where to start)