Drop the pydocstyle Tox environment

Ruff does most of that now.

tox.ini

@@ -8,7 +8,6 @@ envlist =
   ruff-all
   format
   mypy
-  pydocstyle
   unit-tests
 isolated_build = True
 
@@ -71,15 +70,6 @@ setenv =
 commands =
   mypy {[defs]pyfiles}
 
-[testenv:pydocstyle]
-skip_install = True
-tags =
-  check
-deps =
-  pydocstyle >= 6, < 7
-commands =
-  pydocstyle {[defs]pyfiles}
-
 [testenv:pyupgrade]
 skip_install = True
 tags =