correctly configure the EDITOR

N.B.: git is still using nano! wtf git?

helpers/universal/default.nix

@@ -10,6 +10,7 @@
 
   time.timeZone = "America/Los_Angeles";
 
+  # programs.vim.defaultEditor = true;
   environment.variables = {
     EDITOR = "vim";
   };

helpers/universal/users.nix

@@ -47,7 +47,4 @@
     permitRootLogin = "no";
     passwordAuthentication = false;
   };
-
-  # TODO colin: move this somewhere else!
-  programs.vim.defaultEditor = true;
 }