Remove mbedtls_2 workaround for dolphin packages

Dolphin-emu and dolphin-emu-primehack now use maintained mbedtls version
3.6.5 instead of unmaintained mbedtls_2. No longer need to permit insecure
packages.

Verified both packages build successfully without the workaround.

roles/desktop/gaming.nix

@@ -30,14 +30,6 @@ in
         dedicatedServer.openFirewall = true;
         localNetworkGameTransfers.openFirewall = true;
       };
-
-      # TODO: Remove me once dolphin-emu and dolphin-emu-primehack update
-      #       dependencies to mbedtls from mbedtls_2 (which is currently)
-      #       unmaintained
-      nixpkgs.config.permittedInsecurePackages = [ "mbedtls-2.28.10" ];
-      warnings = [
-        "Using insecure mbedtls-2.28.10 for Dolphin Emu - check for updates regularly"
-      ];
     })
   ];
 }