Remove unused configuration and commented code

Eliminated obsolete systemPath entry from Darwin services default configuration. Removed unused foreign-env plugin and commented code related to shell initialization in Fish configuration. Additionally, commented out unnecessary SSH configuration options in user-specific settings.

modules/darwin/services/base/default.nix

@@ -47,7 +47,9 @@ in
 
     programs = {
       fish.enable = true;
-      vim.enable = true;
+    };
+
+    programs = {
       bash = {
         ## shellInit = ''
         interactiveShellInit = ''