chore: remove broken overlay

overlays/default.nix

@@ -7,13 +7,9 @@
   # You can change versions, add patches, set compilation flags, anything really.
   # https://nixos.wiki/wiki/Overlays
   modifications = final: prev: {
-    logisim-evolution = prev.logisim-evolution.overrideAttrs (oldAttrs: {
-      postInstall =
-        (oldAttrs.postInstall or "")
-        + ''
-          wrapProgram $out/bin/logisim-evolution --set _JAVA_AWT_WM_NONREPARENTING 1
-        '';
-    });
+    # example = prev.example.overrideAttrs (oldAttrs: rec {
+    # ...
+    # });
   };
 
   # When applied, the unstable nixpkgs set (declared in the flake inputs) will