home-assistant: remove what is now in nixos-modules

Flake lock file updates:

• Updated input 'nixos-modules':
    'github:SuperSandro2000/nixos-modules/28865ab38ccea31881114e4b949e98705ccf5cfd' (2023-12-09)
  → 'github:SuperSandro2000/nixos-modules/d168ca3340fbb1d308c2e19fc3b612df4a2afae1' (2023-12-15)

flake.lock

@@ -398,11 +398,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1702166165,
-        "narHash": "sha256-WZpoMmptuE0HVHmXiejAfm+GK11MAHRM9stmME274cQ=",
+        "lastModified": 1702673978,
+        "narHash": "sha256-9S8zAh19eefZRX9yVpy33ka4AoFOBVXHwpKIFXeFWe4=",
         "owner": "SuperSandro2000",
         "repo": "nixos-modules",
-        "rev": "28865ab38ccea31881114e4b949e98705ccf5cfd",
+        "rev": "d168ca3340fbb1d308c2e19fc3b612df4a2afae1",
         "type": "github"
       },
       "original": {

hosts/home-assistant/default.nix

@@ -43,7 +43,6 @@ in
     home-assistant = {
       enable = true;
       config = {
-        automation = "!include automations.yaml";
         binary_sensor = [
           {
             platform = "rest";