icdiff: remove self (aneeshusa) from maintainers

I've fully switched over to using delta
and haven't used icdiff in over a year.

pkgs/tools/text/icdiff/default.nix

@@ -28,7 +28,7 @@ python3Packages.buildPythonApplication rec {
   meta = with lib; {
     homepage = "https://www.jefftk.com/icdiff";
     description = "Side-by-side highlighted command line diffs";
-    maintainers = with maintainers; [ aneeshusa ];
+    maintainers = with maintainers; [ ];
     license = licenses.psfl;
   };
 }