Remove some stale docs

[Phoenix500526]

Please briefly answer these questions:

• what problem are you trying to solve? (or if there's no problem, what's the motivation for this change?) remove some stale docs

• what changes does this pull request make? remove some stale docs

• are there any non-obvious implications of these changes? (does it break compatibility with previous versions, etc) No

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 75.66%. Comparing base (e35b35a) to head (dd99578). Report is 110 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #849 +/- ## ========================================== + Coverage 75.55% 75.66% +0.10% ========================================== Files 180 187 +7 Lines 26938 27667 +729 Branches 26938 27667 +729 ========================================== + Hits 20353 20934 +581 - Misses 5366 5449 +83 - Partials 1219 1284 +65 ```

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