top-level/mpvScripts: import → callPackage

This avoids needing to enumerate all the parameters.

pkgs/top-level/all-packages.nix

···
     wlroots = wlroots_0_15;
   };
 
-  mpvScripts = import ../applications/video/mpv/scripts { inherit lib callPackage config; };
+  mpvScripts = callPackage ../applications/video/mpv/scripts { };
 
   open-in-mpv = callPackage ../applications/video/open-in-mpv { };