Off-board Jean-Paul from PSio production grid

Signed-off-by: Benoit Donneaux <benoit@leastauthority.com>

morph/grid/production/public-keys/users.nix

 let
-  jcalderone = ["ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGN4VQm3BIQKEFTw6aPrEwNuShf640N+Py2LOKznFCRT exarkun@bottom"];
   flo = ["ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAII6EUU/KNDr7y3m5OVWBZAuPiMJ4us3YOBEhxpG29yPN flo@la"];
 in {
-  "root" = jcalderone ++ flo;
-  "jcalderone" = jcalderone;
+  "root" = flo;
   "flo" = flo;
 }