CLN: remove incorrect usages of com.AbstractMethodError
- [ ] closes #xxxx
- [ ] tests added / passed
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

Hello @jbrockmendel! Thanks for submitting the PR.

 - There are no PEP8 issues in the file [`pandas/core/generic.py`](https://github.com/jbrockmendel/pandas/blob/4dffe6293d5a90e1c3691af8575205e49ebde134/pandas/core/generic.py) !

 - There are no PEP8 issues in the file [`pandas/core/groupby/generic.py`](https://github.com/jbrockmendel/pandas/blob/4dffe6293d5a90e1c3691af8575205e49ebde134/pandas/core/groupby/generic.py) !

 - There are no PEP8 issues in the file [`pandas/core/groupby/groupby.py`](https://github.com/jbrockmendel/pandas/blob/4dffe6293d5a90e1c3691af8575205e49ebde134/pandas/core/groupby/groupby.py) !

 - There are no PEP8 issues in the file [`pandas/core/groupby/ops.py`](https://github.com/jbrockmendel/pandas/blob/4dffe6293d5a90e1c3691af8575205e49ebde134/pandas/core/groupby/ops.py) !

 - There are no PEP8 issues in the file [`pandas/core/indexes/datetimelike.py`](https://github.com/jbrockmendel/pandas/blob/4dffe6293d5a90e1c3691af8575205e49ebde134/pandas/core/indexes/datetimelike.py) !

 - There are no PEP8 issues in the file [`pandas/io/common.py`](https://github.com/jbrockmendel/pandas/blob/4dffe6293d5a90e1c3691af8575205e49ebde134/pandas/io/common.py) !

 - There are no PEP8 issues in the file [`pandas/io/html.py`](https://github.com/jbrockmendel/pandas/blob/4dffe6293d5a90e1c3691af8575205e49ebde134/pandas/io/html.py) !

 - There are no PEP8 issues in the file [`pandas/io/json/json.py`](https://github.com/jbrockmendel/pandas/blob/4dffe6293d5a90e1c3691af8575205e49ebde134/pandas/io/json/json.py) !

 - There are no PEP8 issues in the file [`pandas/io/parquet.py`](https://github.com/jbrockmendel/pandas/blob/4dffe6293d5a90e1c3691af8575205e49ebde134/pandas/io/parquet.py) !

 - There are no PEP8 issues in the file [`pandas/io/parsers.py`](https://github.com/jbrockmendel/pandas/blob/4dffe6293d5a90e1c3691af8575205e49ebde134/pandas/io/parsers.py) !

 - There are no PEP8 issues in the file [`pandas/plotting/_core.py`](https://github.com/jbrockmendel/pandas/blob/4dffe6293d5a90e1c3691af8575205e49ebde134/pandas/plotting/_core.py) !

 - There are no PEP8 issues in the file [`pandas/tests/io/parser/test_parsers.py`](https://github.com/jbrockmendel/pandas/blob/4dffe6293d5a90e1c3691af8575205e49ebde134/pandas/tests/io/parser/test_parsers.py) !

 - There are no PEP8 issues in the file [`pandas/tests/test_resample.py`](https://github.com/jbrockmendel/pandas/blob/4dffe6293d5a90e1c3691af8575205e49ebde134/pandas/tests/test_resample.py) !

 - There are no PEP8 issues in the file [`pandas/tseries/offsets.py`](https://github.com/jbrockmendel/pandas/blob/4dffe6293d5a90e1c3691af8575205e49ebde134/pandas/tseries/offsets.py) !

 lgtm. ping on green. Please cancela pool thanks # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/23625?src=pr&el=h1) Report
> Merging [#23625](https://codecov.io/gh/pandas-dev/pandas/pull/23625?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/011b79fbf73b45313b47c08b4be1fc07dcb99365?src=pr&el=desc) will **decrease** coverage by `<.01%`.
> The diff coverage is `100%`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/23625/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/23625?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #23625      +/-   ##
==========================================
- Coverage   92.24%   92.24%   -0.01%     
==========================================
  Files         161      161              
  Lines       51326    51317       -9     
==========================================
- Hits        47347    47338       -9     
  Misses       3979     3979
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.63% <100%> (-0.01%)` | :arrow_down: |
| #single | `42.31% <100%> (-0.02%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/23625?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/core/groupby/generic.py](https://codecov.io/gh/pandas-dev/pandas/pull/23625/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZ3JvdXBieS9nZW5lcmljLnB5) | `87.07% <ø> (ø)` | :arrow_up: |
| [pandas/io/common.py](https://codecov.io/gh/pandas-dev/pandas/pull/23625/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2NvbW1vbi5weQ==) | `70.54% <ø> (-0.23%)` | :arrow_down: |
| [pandas/io/html.py](https://codecov.io/gh/pandas-dev/pandas/pull/23625/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2h0bWwucHk=) | `91.2% <ø> (-0.06%)` | :arrow_down: |
| [pandas/core/generic.py](https://codecov.io/gh/pandas-dev/pandas/pull/23625/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZ2VuZXJpYy5weQ==) | `96.81% <ø> (ø)` | :arrow_up: |
| [pandas/plotting/\_core.py](https://codecov.io/gh/pandas-dev/pandas/pull/23625/diff?src=pr&el=tree#diff-cGFuZGFzL3Bsb3R0aW5nL19jb3JlLnB5) | `83.63% <ø> (ø)` | :arrow_up: |
| [pandas/core/groupby/ops.py](https://codecov.io/gh/pandas-dev/pandas/pull/23625/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZ3JvdXBieS9vcHMucHk=) | `96.79% <ø> (ø)` | :arrow_up: |
| [pandas/io/parquet.py](https://codecov.io/gh/pandas-dev/pandas/pull/23625/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL3BhcnF1ZXQucHk=) | `84.61% <ø> (-0.15%)` | :arrow_down: |
| [pandas/core/groupby/groupby.py](https://codecov.io/gh/pandas-dev/pandas/pull/23625/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZ3JvdXBieS9ncm91cGJ5LnB5) | `96.51% <ø> (ø)` | :arrow_up: |
| [pandas/io/json/json.py](https://codecov.io/gh/pandas-dev/pandas/pull/23625/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2pzb24vanNvbi5weQ==) | `93.09% <ø> (-0.02%)` | :arrow_down: |
| [pandas/io/parsers.py](https://codecov.io/gh/pandas-dev/pandas/pull/23625/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL3BhcnNlcnMucHk=) | `95.55% <ø> (-0.01%)` | :arrow_down: |
| ... and [2 more](https://codecov.io/gh/pandas-dev/pandas/pull/23625/diff?src=pr&el=tree-more) | |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/23625?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/23625?src=pr&el=footer). Last update [011b79f...b49c194](https://codecov.io/gh/pandas-dev/pandas/pull/23625?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 Ping can you rebase thanks!