p11_kit: don't build documentation

This depends ultimately on texlive which is a big build and depends on
lots of libraries which often get security updates. This triggers
mass rebuilds because systemd depends on gnutls which depends on
p11_kit.

This was introduced with 93d80f1951.

pkgs/development/libraries/p11-kit/default.nix

@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, autoreconfHook, which, pkgconfig, libiconv
-, libffi, libtasn1, gtk_doc, libxslt, docbook_xsl }:
+, libffi, libtasn1 }:
 
 stdenv.mkDerivation rec {
   name = "p11-kit-${version}";
@@ -12,10 +12,10 @@ stdenv.mkDerivation rec {
     sha256 = "1l8sg0g74k2mk0y6vz19hc103dzizxa0h579gdhvxifckglb01hy";
   };
 
-  outputs = [ "out" "dev" "devdoc" ];
+  outputs = [ "out" "dev"];
   outputBin = "dev";
 
-  nativeBuildInputs = [ autoreconfHook which pkgconfig gtk_doc libxslt docbook_xsl ];
+  nativeBuildInputs = [ autoreconfHook which pkgconfig ];
   buildInputs = [ libffi libtasn1 libiconv ];
 
   autoreconfPhase = ''
@@ -26,7 +26,6 @@ stdenv.mkDerivation rec {
     "--sysconfdir=/etc"
     "--localstatedir=/var"
     "--without-trust-paths"
-    "--enable-doc"
   ];
 
   installFlags = [ "exampledir=\${out}/etc/pkcs11" ];