revert nixpkgs-unstable bump and cleanup

Author: domenkozar

flake.lock

@@ -46,7 +46,7 @@
           inherit (exposed.checks.pre-commit-check) shellHook;
         };
 
-        checks = exposed.checks // (builtins.removeAttrs exposed-stable.checks [ "revive" "purs-tidy" ]);
+        checks = exposed.checks // exposed-stable.checks;
 
         lib = { inherit (exposed) run; };
       }

flake.nix

@@ -39,6 +39,7 @@
 , stylua
 , texlive
 , typos
+, yamllint
 , writeScript
 , writeText
 , go
@@ -53,13 +54,12 @@ let
   };
 in
 {
-  inherit actionlint alejandra cabal-fmt cabal2nix cargo clang-tools clippy deadnix dhall editorconfig-checker hadolint hindent hlint hpack html-tidy nixfmt nixpkgs-fmt ormolu rustfmt shellcheck shfmt statix stylish-haskell stylua typos go mdsh revive go-tools;
+  inherit actionlint ansible-lint alejandra cabal-fmt cabal2nix cargo clang-tools clippy deadnix dhall editorconfig-checker hadolint hindent hlint hpack html-tidy nixfmt nixpkgs-fmt ormolu rustfmt shellcheck shfmt statix stylish-haskell stylua typos go mdsh revive go-tools yamllint;
   inherit (elmPackages) elm-format elm-review elm-test;
   # TODO: these two should be statically compiled
   inherit (haskellPackages) fourmolu;
   inherit (luaPackages) luacheck;
   inherit (nodePackages) eslint markdownlint-cli prettier;
-  inherit (python39Packages) ansible-lint yamllint;
   purs-tidy = nodePackages.purs-tidy or null;
   cabal2nix-dir = callPackage ./cabal2nix-dir { };
   hpack-dir = callPackage ./hpack-dir { };