Remove unused param/method
- [y] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`

-Remove unused param "op" in `_validate_for_numeric_unaryop`. ( Param remove from single call of function)

-Static method `_from_element` appears to be unused

# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/22289?src=pr&el=h1) Report
> Merging [#22289](https://codecov.io/gh/pandas-dev/pandas/pull/22289?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/0370740034978d3a63d4b8e5e2c96ff54e7e08ba?src=pr&el=desc) will **increase** coverage by `<.01%`.
> The diff coverage is `100%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/22289/graphs/tree.svg?width=650&height=150&src=pr&token=eZ4WkYLtcO)](https://codecov.io/gh/pandas-dev/pandas/pull/22289?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #22289      +/-   ##
==========================================
+ Coverage   92.08%   92.08%   +<.01%     
==========================================
  Files         169      169              
  Lines       50694    50691       -3     
==========================================
- Hits        46682    46680       -2     
+ Misses       4012     4011       -1
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.49% <100%> (ø)` | :arrow_up: |
| #single | `42.34% <50%> (-0.01%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/22289?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/core/indexes/multi.py](https://codecov.io/gh/pandas-dev/pandas/pull/22289/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW5kZXhlcy9tdWx0aS5weQ==) | `95.41% <ø> (+0.07%)` | :arrow_up: |
| [pandas/core/indexes/datetimes.py](https://codecov.io/gh/pandas-dev/pandas/pull/22289/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW5kZXhlcy9kYXRldGltZXMucHk=) | `95.54% <ø> (ø)` | :arrow_up: |
| [pandas/core/indexes/base.py](https://codecov.io/gh/pandas-dev/pandas/pull/22289/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvaW5kZXhlcy9iYXNlLnB5) | `96.43% <100%> (ø)` | :arrow_up: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/22289?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/22289?src=pr&el=footer). Last update [0370740...152ee47](https://codecov.io/gh/pandas-dev/pandas/pull/22289?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 IMO the changes are semantically distinct enough that they should be broken up into separate PR's for evaluation.  @alimcmaster1 : what do you think?

cc @jreback  Sure @gfyoung , happy to break it up makes it easier to review. 

See new PR's here:
#22321
#22323 
#22322
#22324

Ill close this one :)   