ssh-client: own ~/.ssh, not the openssh package

A package has one owning module, and sshd already owns openssh on every node — assigning
ssh-client was refused for both declaring it, and the refusal left every node unresolvable
until it was unassigned. Owning it was wrong besides: unassigning ssh-client would have
removed the package sshd serves from. The client binary ships in the package sshd holds.

modules/ssh-client/module.json

@@ -2,11 +2,6 @@
   "module": "ssh-client",
   "version": "1",
   "resources": [
-    {
-      "id": "openssh",
-      "type": "package",
-      "package": "openssh"
-    },
     {
       "id": "ssh-dir",
       "type": "directory",