connman: remove import of networkmanager

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pkgs/tools/networking/connman/connman.nix
··· 42 , enableDatafiles ? true 43 # optional features which are turned *off* by default 44 , enableNetworkManager ? false 45 - , networkmanager ? null 46 , enableHh2serialGps ? false 47 , enableL2tp ? false 48 , enableIospm ? false
··· 42 , enableDatafiles ? true 43 # optional features which are turned *off* by default 44 , enableNetworkManager ? false 45 , enableHh2serialGps ? false 46 , enableL2tp ? false 47 , enableIospm ? false