libsoup: Remove passthru.propagatedUserEnvPackages

That does not do anything.

The proper attribute name recognized by the generic builder is `propagatedUserEnvPkgs`
and even that is an ugly hack to have `nix-env` pull in extra packages into the profile.

Looks like it has been mistakenly put to `passthru` since the beginning:
24448ed3de

Apps that use TLS in conjunction with GLib/libsoup should just add `glib-networking` to `buildInputs`
and `wrapGAppsHook` to `nativeBuildInputs` to add the appropriate Gio module
to `GIO_EXTRA_MODULES` environment variable.

pkgs/applications/networking/p2p/transmission-remote-gtk/default.nix

@@ -7,6 +7,7 @@
 , geoip
 , gettext
 , glib
+, glib-networking
 , gtk3
 , json-glib
 , libappindicator
@@ -50,7 +51,9 @@ stdenv.mkDerivation rec {
     libmrss
     libproxy
     libsoup_3
-  ] ++ libsoup_3.propagatedUserEnvPackages;
+    # For TLS support.
+    glib-networking
+  ];
 
   doCheck = false; # Requires network access
 

pkgs/development/libraries/libsoup/3.x.nix

@@ -8,7 +8,6 @@
 , gnome
 , libsysprof-capture
 , sqlite
-, glib-networking
 , buildPackages
 , gobject-introspection
 , withIntrospection ? lib.meta.availableOn stdenv.hostPlatform gobject-introspection && stdenv.hostPlatform.emulatorAvailable buildPackages
@@ -93,9 +92,6 @@ stdenv.mkDerivation rec {
   '';
 
   passthru = {
-    propagatedUserEnvPackages = [
-      glib-networking.out
-    ];
     updateScript = gnome.updateScript {
       attrPath = "libsoup_3";
       packageName = pname;

pkgs/development/libraries/libsoup/default.nix

@@ -14,7 +14,6 @@
 , brotli
 , gnomeSupport ? true
 , sqlite
-, glib-networking
 , buildPackages
 , withIntrospection ? lib.meta.availableOn stdenv.hostPlatform gobject-introspection && stdenv.hostPlatform.emulatorAvailable buildPackages
 }:
@@ -85,9 +84,6 @@ stdenv.mkDerivation rec {
   '';
 
   passthru = {
-    propagatedUserEnvPackages = [
-      glib-networking.out
-    ];
     updateScript = gnome.updateScript {
       packageName = pname;
       versionPolicy = "odd-unstable";