flake: drop srvos nixos-23_05 input

flake.lock

@@ -266,16 +266,17 @@
     },
     "srvos": {
       "inputs": {
+        "nixos-23_05": [],
         "nixpkgs": [
           "nixpkgs"
         ]
       },
       "locked": {
-        "lastModified": 1699089426,
-        "narHash": "sha256-sKn293aK7HxUDMUL/36aqQIJ1eEaoM72PGYevaNGS5Q=",
+        "lastModified": 1699261528,
+        "narHash": "sha256-9uD1xuL14UlNMAZlS2akLsOtfEVDntDk8qNjo2jf4uc=",
         "owner": "nix-community",
         "repo": "srvos",
-        "rev": "d725309c965ccad663c16f141ccedecd64317b96",
+        "rev": "a1f21ef419e748dce33b17fe5685f21b6b956f90",
         "type": "github"
       },
       "original": {

flake.nix

@@ -22,6 +22,7 @@
     srvos.url = "github:nix-community/srvos";
     # actually not used when using the modules but than nothing ever will try to fetch this nixpkgs variant
     srvos.inputs.nixpkgs.follows = "nixpkgs";
+    srvos.inputs.nixos-23_05.follows = "";
 
     nixpkgs-update.url = "github:qowoz/nixpkgs-update/wait60";
     nixpkgs-update.inputs.mmdoc.follows = "";