plugins/lsp: fix building pylsp-mypy 0.8.0

The current pinned version of nixpkgs brings in pylsp-mypy 0.8.0, which
no longer tracks dependencies in setup.cfg but rather in pyproject.toml,
which makes the current `substituteInPlace` fail. This changes the rule
to match the patches for `rope`, `ruff` and others.

Note that the pylsp-mypy project currently has an issue with their repo
governance which has caused the module as it exists in pypi to diverge
from the code in GitHub: https://github.com/python-lsp/pylsp-mypy/issues/113.

Signed-off-by: squat <lserven@gmail.com>

plugins/lsp/language-servers/pylsp.nix

@@ -548,10 +548,7 @@ in
               with cfg.pythonPackage.pkgs;
               {
                 pylsp_mypy = pylsp-mypy.overridePythonAttrs (old: {
-                  postPatch = old.postPatch or "" + ''
-                    substituteInPlace setup.cfg \
-                      --replace-fail "python-lsp-server >=1.7.0" ""
-                  '';
+                  pythonRemoveDeps = (old.pythonRemoveDeps or [ ]) ++ [ "python-lsp-server" ];
                 });
                 isort = pyls-isort.overridePythonAttrs (old: {
                   postPatch = old.postPatch or "" + ''