PERF: asvs are failing
This is from a PR recently rebased; I don't think the asv's were run when we merged the ordered deprecation changes

https://dev.azure.com/pandas-dev/pandas/_build/results?buildId=13903

cc @jschendel 


```
[  4.36%] ··· categoricals.Rank.time_rank_string_cat                      failed
[  4.36%] ···· Traceback (most recent call last):
                 File "/home/vsts/miniconda3/envs/pandas-dev/lib/python3.7/site-packages/asv/benchmark.py", line 1184, in main_run_server
                   main_run(run_args)
                 File "/home/vsts/miniconda3/envs/pandas-dev/lib/python3.7/site-packages/asv/benchmark.py", line 1052, in main_run
                   skip = benchmark.do_setup()
                 File "/home/vsts/miniconda3/envs/pandas-dev/lib/python3.7/site-packages/asv/benchmark.py", line 583, in do_setup
                   result = Benchmark.do_setup(self)
                 File "/home/vsts/miniconda3/envs/pandas-dev/lib/python3.7/site-packages/asv/benchmark.py", line 515, in do_setup
                   setup(*self._current_params)
                 File "/home/vsts/work/1/s/asv_bench/benchmarks/categoricals.py", line 138, in setup
                   ordered=True)
                 File "/home/vsts/work/1/s/pandas/core/generic.py", line 5600, in astype
                   **kwargs)
                 File "/home/vsts/work/1/s/pandas/core/internals/managers.py", line 529, in astype
                   return self.apply('astype', dtype=dtype, **kwargs)
                 File "/home/vsts/work/1/s/pandas/core/internals/managers.py", line 393, in apply
                   applied = getattr(b, f)(**kwargs)
                 File "/home/vsts/work/1/s/pandas/core/internals/blocks.py", line 514, in astype
                   **kwargs)
                 File "/home/vsts/work/1/s/pandas/core/internals/blocks.py", line 554, in _astype
                   deprecated_arg))
               ValueError: Got an unexpected argument: ordered
```