DOC: Remove 1.0.0 versionadded/versionchanged
- [ ] xref #51071 (Replace xxxx with the GitHub issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) to new arguments/methods/functions.
- [ ] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

Removing 1.0.0 is non-controversial based on the discussion in the op. So want to get this removed for 2.0 to clean up our docs a bit
```
Error: /home/runner/work/pandas/pandas/pandas/core/indexes/multi.py:597:PR09:pandas.MultiIndex.from_product:Parameter "names" description should finish with "."
Error: /home/runner/work/pandas/pandas/pandas/core/arrays/integer.py:62:SS03:pandas.arrays.IntegerArray:Summary does not end with a period
Error: /home/runner/work/pandas/pandas/pandas/core/arrays/integer.py:62:SS06:pandas.arrays.IntegerArray:Summary should fit in a single line
Error: /home/runner/work/pandas/pandas/pandas/core/arrays/integer.py:155:SS06:pandas.Int8Dtype:Summary should fit in a single line
Error: /home/runner/work/pandas/pandas/pandas/core/arrays/integer.py:162:SS06:pandas.Int16Dtype:Summary should fit in a single line
Error: /home/runner/work/pandas/pandas/pandas/core/arrays/integer.py:169:SS06:pandas.Int32Dtype:Summary should fit in a single line
Error: /home/runner/work/pandas/pandas/pandas/core/arrays/integer.py:176:SS06:pandas.Int64Dtype:Summary should fit in a single line
Error: /home/runner/work/pandas/pandas/pandas/core/arrays/integer.py:183:SS06:pandas.UInt8Dtype:Summary should fit in a single line
Error: /home/runner/work/pandas/pandas/pandas/core/arrays/integer.py:190:SS06:pandas.UInt16Dtype:Summary should fit in a single line
Error: /home/runner/work/pandas/pandas/pandas/core/arrays/integer.py:197:SS06:pandas.UInt32Dtype:Summary should fit in a single line
Error: /home/runner/work/pandas/pandas/pandas/core/arrays/integer.py:204:SS06:pandas.UInt64Dtype:Summary should fit in a single line
``` thx Thanks @phofl 