MAINT: Drop has_index_names input from read_excel
Deprecated since 0.17.0

xref #10967
# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16522?src=pr&el=h1) Report
> Merging [#16522](https://codecov.io/gh/pandas-dev/pandas/pull/16522?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/fb47ee56d95ff1d5fcdff5dc589491c63a238bac?src=pr&el=desc) will **decrease** coverage by `0.03%`.
> The diff coverage is `100%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/16522/graphs/tree.svg?height=150&width=650&token=eZ4WkYLtcO&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/16522?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #16522      +/-   ##
==========================================
- Coverage   90.78%   90.75%   -0.04%     
==========================================
  Files         161      161              
  Lines       51089    51086       -3     
==========================================
- Hits        46380    46361      -19     
- Misses       4709     4725      +16
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.58% <100%> (-0.04%)` | :arrow_down: |
| #single | `40.16% <0%> (ø)` | :arrow_up: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/16522?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/excel.py](https://codecov.io/gh/pandas-dev/pandas/pull/16522?src=pr&el=tree#diff-cGFuZGFzL2lvL2V4Y2VsLnB5) | `80.55% <100%> (-0.09%)` | :arrow_down: |
| [pandas/plotting/\_converter.py](https://codecov.io/gh/pandas-dev/pandas/pull/16522?src=pr&el=tree#diff-cGFuZGFzL3Bsb3R0aW5nL19jb252ZXJ0ZXIucHk=) | `63.23% <0%> (-1.82%)` | :arrow_down: |
| [pandas/io/parsers.py](https://codecov.io/gh/pandas-dev/pandas/pull/16522?src=pr&el=tree#diff-cGFuZGFzL2lvL3BhcnNlcnMucHk=) | `95.42% <0%> (-0.27%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16522?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/16522?src=pr&el=footer). Last update [fb47ee5...f882497](https://codecov.io/gh/pandas-dev/pandas/pull/16522?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 thanks!