cargo-docset: remove. it's been upstreamed

pkgs/additional/cargo-docset/default.nix

@@ -1,30 +0,0 @@
-{ lib
-, fetchFromGitHub
-, rustPlatform
-, sqlite
-}:
-
-rustPlatform.buildRustPackage rec {
-  pname = "cargo-docset";
-  version = "0.3.1";
-
-  src = fetchFromGitHub {
-    owner = "Robzz";
-    repo = pname;
-    rev = "v${version}";
-    hash = "sha256-o2CSQiU9fEoS3eRmwphtYGZTwn3mstRm2Tlvval83+U=";
-  };
-
-  cargoHash = "sha256-YHrSvfHfQ7kbVeCOgggYf3E7gHq+RhVKZrzP8LqX5I0=";
-
-  buildInputs = [
-    sqlite
-  ];
-
-  meta = with lib; {
-    description = "Cargo subcommand to generate a Dash/Zeal docset for your Rust packages. ";
-    homepage = "https://github.com/Robzz/cargo-docset";
-    license = licenses.asl20;
-    maintainers = with maintainers; [ colinsane ];
-  };
-}

pkgs/default.nix

@@ -62,7 +62,6 @@ let
 
     # provided by nixpkgs patch or upstream PR
     # i still conditionally callPackage these to make them available to external consumers (like NUR)
-    cargo-docset = unpatched.cargo-docset or (callPackage ./additional/cargo-docset { });
     splatmoji = unpatched.splatmoji or (callPackage ./additional/splatmoji { });