Remove Cython warnings
  warning: /Users/runner/work/pandas/pandas/pandas/_libs/tslibs/util.pxd:188:38: noexcept clause is ignored for function returning Python object
  warning: /Users/runner/work/pandas/pandas/pandas/_libs/tslibs/util.pxd:193:40: noexcept clause is ignored for function returning Python object
Thanks @WillAyd 