heimdall: Unmark other platforms as broken

Windows with frontend depends on broken packages to compile, but there
is no reason to believe that it wouldn't work once qtbase is fixed up
given that the command line version works just fine.

pkgs/by-name/he/heimdall/package.nix

@@ -58,7 +58,6 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   meta = {
-    broken = enableGUI && !stdenv.hostPlatform.isLinux;
     description = "Cross-platform open-source tool suite used to flash firmware onto Samsung Galaxy devices";
     homepage = "https://git.sr.ht/~grimler/Heimdall";
     license = lib.licenses.mit;