[CLN] remove last cython: nprofile comments
Separates out parts of #22287 to troubleshoot persistent Travis failures.
# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/22371?src=pr&el=h1) Report
> Merging [#22371](https://codecov.io/gh/pandas-dev/pandas/pull/22371?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/70e6f7c3ce7aca9a0ee08bacb2fe0ad85db02d88?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/22371/graphs/tree.svg?token=eZ4WkYLtcO&width=650&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/22371?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #22371   +/-   ##
=======================================
  Coverage   92.05%   92.05%           
=======================================
  Files         169      169           
  Lines       50709    50709           
=======================================
  Hits        46679    46679           
  Misses       4030     4030
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.46% <ø> (ø)` | :arrow_up: |
| #single | `42.25% <ø> (ø)` | :arrow_up: |


------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/22371?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/22371?src=pr&el=footer). Last update [70e6f7c...b707049](https://codecov.io/gh/pandas-dev/pandas/pull/22371?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 thanks