Revert "editors: mode to individual module.nix"

This reverts commit 7f76156bacf20617671108f1ca29a2e1e945e3bb.

modules/programs/editors/module.nix

@@ -0,0 +1,8 @@
+_: {
+  imports = [
+    ./emacs/module.nix
+    ./helix/module.nix
+    ./kakoune
+    ./nvf
+  ];
+}