pkgs/tools/typesetting: remove dead code

pkgs/tools/typesetting/lowdown/default.nix

···
 { lib, stdenv, fetchurl, fixDarwinDylibNames, which, dieHook
-, enableShared ? !(stdenv.hostPlatform.isStatic)
+, enableShared ? !stdenv.hostPlatform.isStatic
 , enableStatic ? stdenv.hostPlatform.isStatic
 # for passthru.tests
 , nix
···
 
   postInstall =
     let
-      inherit (stdenv.hostPlatform.extensions) sharedLibrary;
       soVersion = "3";
     in
 

pkgs/tools/typesetting/satysfi/default.nix

···
-{ lib, stdenv, fetchFromGitHub, ruby, ocamlPackages
+{ lib, fetchFromGitHub, ocamlPackages
 , ipaexfont, junicode, lmodern, lmmath
 }:
 let
-  camlpdf = ocamlPackages.camlpdf.overrideAttrs (o: {
+  camlpdf = ocamlPackages.camlpdf.overrideAttrs {
     src = fetchFromGitHub {
       owner = "gfngfn";
       repo = "camlpdf";
       rev = "v2.3.1+satysfi";
       sha256 = "1s8wcqdkl1alvfcj67lhn3qdz8ikvd1v64f4q6bi4c0qj9lmp30k";
     };
-  });
+  };
   otfm = ocamlPackages.otfm.overrideAttrs (o: {
     src = fetchFromGitHub {
       owner = "gfngfn";

pkgs/tools/typesetting/tex/mftrace/default.nix

···
 , lib
 , makeWrapper
 , autoreconfHook
-, buildEnv
 , python3
 , fontforge
 , potrace

pkgs/tools/typesetting/tex/pgf-tikz/pgf-umlsd.nix

···
 , fetchFromGitHub
 }:
 
-stdenvNoCC.mkDerivation (finalAttrs: {
+stdenvNoCC.mkDerivation {
   pname = "pgf-umlcd";
   version = "unstable-2020-05-28";
 
···
     maintainers = with maintainers; [ AndersonTorres ];
     platforms = platforms.unix;
   };
-})
+}