refactor(ssh): Remove unused add_root_ssh_key function

selfprivacy_api/actions/ssh.py

@@ -49,19 +49,6 @@ def set_ssh_settings(
             data["ssh"]["passwordAuthentication"] = password_authentication
 
 
-def add_root_ssh_key(public_key: str):
-    with WriteUserData() as data:
-        if "ssh" not in data:
-            data["ssh"] = {}
-        if "rootKeys" not in data["ssh"]:
-            data["ssh"]["rootKeys"] = []
-        # Return 409 if key already in array
-        for key in data["ssh"]["rootKeys"]:
-            if key == public_key:
-                raise KeyAlreadyExists()
-        data["ssh"]["rootKeys"].append(public_key)
-
-
 class KeyAlreadyExists(Exception):
     """Key already exists"""