Revert "build02: run optimise store weekly"

This reverts commit 9d5ab7f7ec.

hosts/build02/configuration.nix

@@ -11,12 +11,6 @@
     inputs.self.nixosModules.disko-raid
   ];
 
-  # workaround for excessive inode usage on this host, `auto-optimise-store` isn't working?
-  nix.optimise = {
-    automatic = true;
-    dates = [ "weekly" ];
-  };
-
   nixCommunity.disko.raidLevel = 0; # more disk space, we don't have much state to restore anyway
 
   networking.hostName = "build02";