Revert "add detached CLI option (#87)"

This reverts commit b590e39.

nix/process-compose/cli.nix

@@ -33,11 +33,6 @@ in
         default = { };
         type = types.submodule {
           options = {
-            detached = mkOption {
-              type = types.bool;
-              default = false;
-              description = "Pass --detached to process-compose";
-            };
             log-file = mkOption {
               type = types.nullOr types.str;
               default = null;
@@ -85,8 +80,7 @@ in
           readOnly = true;
           description = "The final CLI arguments we will pass to process-compose binary.";
           default = let o = config.cli.options; in lib.escapeShellArgs (
-            (lib.optionals o.detached [ "--detached" ])
-            ++ (lib.optionals (o.log-file != null) [ "--log-file" o.log-file ])
+            (lib.optionals (o.log-file != null) [ "--log-file" o.log-file ])
             ++ (lib.optionals o.no-server [ "--no-server" ])
             ++ (lib.optionals o.ordered-shutdown [ "--ordered-shutdown" ])
             ++ (lib.optionals (o.port != null) [ "--port" "${builtins.toString o.port}" ])