Remove 'reduce' from lib_depends, closes #19467
- [x] closes #19467
- [ ] tests added / passed
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/19472?src=pr&el=h1) Report
> Merging [#19472](https://codecov.io/gh/pandas-dev/pandas/pull/19472?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/d37d867cbb5665ef8cae1ff580fa377eccc84253?src=pr&el=desc) will **decrease** coverage by `<.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/19472/graphs/tree.svg?height=150&width=650&token=eZ4WkYLtcO&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/19472?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #19472      +/-   ##
==========================================
- Coverage    91.6%   91.59%   -0.01%     
==========================================
  Files         150      150              
  Lines       48724    48724              
==========================================
- Hits        44632    44630       -2     
- Misses       4092     4094       +2
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `89.96% <ø> (-0.01%)` | :arrow_down: |
| #single | `41.74% <ø> (ø)` | :arrow_up: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/19472?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/util/testing.py](https://codecov.io/gh/pandas-dev/pandas/pull/19472/diff?src=pr&el=tree#diff-cGFuZGFzL3V0aWwvdGVzdGluZy5weQ==) | `83.64% <0%> (-0.21%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/19472?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/19472?src=pr&el=footer). Last update [d37d867...cffb327](https://codecov.io/gh/pandas-dev/pandas/pull/19472?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 thanks!