dev: drop vim-wakatime flake input

flake.nix

@@ -373,11 +373,6 @@
     };
 
     # Utilities
-    vim-wakatime = {
-      url = "github:wakatime/vim-wakatime";
-      flake = false;
-    };
-
     colorizer = {
       url = "github:uga-rosa/ccc.nvim";
       flake = false;

lib/types/plugins.nix

@@ -81,7 +81,6 @@ with lib; let
     "project-nvim"
     "elixir-ls"
     "elixir-tools"
-    "vim-wakatime"
   ];
   # You can either use the name of the plugin or a package.
   pluginsType = with types;