CLN: no need for suffices anymore in test_hashtable.py
- [ ] tests added / passed
- [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them
- [ ] whatsnew entry

Since we have version with fused types, there is no need to call precise version (i.e. with suffices like int64, int32 and so on) any longer.

Thanks @realead 