Pandas version checks

• I have checked that the issue still exists on the latest versions of the docs on main here

Location of the documentation

https://pandas.pydata.org/docs/reference/api/pandas.Series.shift.html#pandas.Series.shift

Documentation problem

The documentation for Series.shift() documents the parameter suffix, but it has no effect in the code.

Suggested fix for documentation

I think the suffix argument should be removed from the docs.