Remove redundant ssh config lines

morph/grid/local/grid.nix

@@ -13,7 +13,6 @@ import ../../lib/make-grid.nix {
       inherit sshUsers;
       hardware = import ./virtual-hardware.nix ({ inherit publicIPv4; });
       stateVersion = "19.03";
-      services.openssh.permitRootLogin = "yes";
     } // cfg);
 
     "storage1" = import ../../lib/make-testing.nix (rec {
@@ -21,7 +20,6 @@ import ../../lib/make-grid.nix {
       inherit sshUsers;
       hardware = import ./virtual-hardware.nix ({ inherit publicIPv4; });
       stateVersion = "19.09";
-      services.openssh.permitRootLogin = "yes";
     } // cfg);
 
     "storage2" = import ../../lib/make-testing.nix (rec {
@@ -29,7 +27,6 @@ import ../../lib/make-grid.nix {
       inherit sshUsers;
       hardware = import ./virtual-hardware.nix ({ inherit publicIPv4; });
       stateVersion = "19.09";
-      services.openssh.permitRootLogin = "yes";
     } // cfg);
   };
 }