CLN: Remove "flake8: noqa" from even more files 
Another round of house-cleaning that builds off #15867.  Likely to be the last one for now.
# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/15872?src=pr&el=h1) Report
> Merging [#15872](https://codecov.io/gh/pandas-dev/pandas/pull/15872?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/cd24fa95f1781b14d35eac4953bab02691fd9d04?src=pr&el=desc) will **decrease** coverage by `0.01%`.
> The diff coverage is `100%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/15872/graphs/tree.svg?src=pr&height=150&width=650&token=eZ4WkYLtcO)](https://codecov.io/gh/pandas-dev/pandas/pull/15872?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #15872      +/-   ##
==========================================
- Coverage   90.99%   90.97%   -0.02%     
==========================================
  Files         143      143              
  Lines       49479    49477       -2     
==========================================
- Hits        45021    45010      -11     
- Misses       4458     4467       +9
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.73% <100%> (-0.01%)` | :arrow_down: |
| #single | `40.63% <66.66%> (-0.12%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/15872?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/util/clipboard/windows.py](https://codecov.io/gh/pandas-dev/pandas/pull/15872?src=pr&el=tree#diff-cGFuZGFzL3V0aWwvY2xpcGJvYXJkL3dpbmRvd3MucHk=) | `11.62% <ø> (-1.02%)` | :arrow_down: |
| [pandas/compat/pickle\_compat.py](https://codecov.io/gh/pandas-dev/pandas/pull/15872?src=pr&el=tree#diff-cGFuZGFzL2NvbXBhdC9waWNrbGVfY29tcGF0LnB5) | `69.51% <100%> (+1.21%)` | :arrow_up: |
| [pandas/util/clipboard/clipboards.py](https://codecov.io/gh/pandas-dev/pandas/pull/15872?src=pr&el=tree#diff-cGFuZGFzL3V0aWwvY2xpcGJvYXJkL2NsaXBib2FyZHMucHk=) | `26.58% <100%> (ø)` | :arrow_up: |
| [pandas/util/clipboard/\_\_init\_\_.py](https://codecov.io/gh/pandas-dev/pandas/pull/15872?src=pr&el=tree#diff-cGFuZGFzL3V0aWwvY2xpcGJvYXJkL19faW5pdF9fLnB5) | `73.8% <100%> (ø)` | :arrow_up: |
| [pandas/computation/engines.py](https://codecov.io/gh/pandas-dev/pandas/pull/15872?src=pr&el=tree#diff-cGFuZGFzL2NvbXB1dGF0aW9uL2VuZ2luZXMucHk=) | `88.88% <100%> (-0.18%)` | :arrow_down: |
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/15872?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `25% <0%> (-58.34%)` | :arrow_down: |
| [pandas/core/common.py](https://codecov.io/gh/pandas-dev/pandas/pull/15872?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvY29tbW9uLnB5) | `90.96% <0%> (-0.34%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/15872?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `97.56% <0%> (-0.1%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/15872?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/15872?src=pr&el=footer). Last update [cd24fa9...3e610f5](https://codecov.io/gh/pandas-dev/pandas/pull/15872?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments). thanks!