Merge #260048: fwupd: drop removed dell option

pkgs/os-specific/linux/firmware/fwupd/default.nix

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   ] ++ lib.optionals (!enablePassim) [
     "-Dpassim=disabled"
   ] ++ lib.optionals (!haveDell) [
-    "-Dplugin_dell=disabled"
     "-Dplugin_synaptics_mst=disabled"
   ] ++ lib.optionals (!haveRedfish) [
     "-Dplugin_redfish=disabled"