Remove redundant check on `varargs` in `_PyArg_CheckPositional`

[eendebakpt]

Bug report

Bug description:

The condition !_Py_ANY_VARARGS(max) checked in the macro _PyArg_CheckPositional (file Include/internal/modsupport.h) is not used in the method _PyArg_CheckPositional (file getargs.c). Removing the check saves a (very) small bit of time in the often used _PyArg_CheckPositional.

CPython versions tested on:

CPython main branch

Operating systems tested on:

Windows

Linked PRs

• gh-129594: Remove redundant check on varargs in _PyArg_CheckPositional #129595