Set vim as default editor properly

vim.nix

@@ -3,6 +3,7 @@
 {
   programs.vim = { 
     enable = true;
+    defaultEditor = true;
     extraConfig = ''
     " Temporary configuration for editing Nix files
     syntax on
@@ -40,8 +41,4 @@ function! Words()
     hi StatusLine ctermfg=0 ctermbg=none cterm=bold " 0 for the terminal color 0
     '';
   };
-
-  home.sessionVariables = {
-    EDITOR = "vim";
-  };
 }