vimPlugins: remove unnecessary dependency (#366722)

pkgs/applications/editors/vim/plugins/default.nix

···
   lib,
   vimUtils,
   vim,
-  darwin,
   llvmPackages,
   neovim-unwrapped,
   neovimUtils,
···
   # If additional modifications to the build process are required,
   # add to ./overrides.nix.
   overrides = callPackage ./overrides.nix {
-    inherit (darwin.apple_sdk.frameworks) Cocoa CoreFoundation CoreServices;
     inherit buildVimPlugin;
     inherit llvmPackages;
   };

pkgs/applications/editors/vim/plugins/overrides.nix

···
   rustPlatform,
   # Misc dependencies
   arrow-cpp,
-  Cocoa,
   coc-clangd,
   coc-css,
   coc-diagnostic,
···
   cmake,
   icu,
   ncurses,
-  # LanguageClient-neovim dependencies
-  CoreFoundation,
-  CoreServices,
   # nvim-treesitter dependencies
   callPackage,
   # Preview-nvim dependencies
···
 
   vim-addon-goto-thing-at-cursor = super.vim-addon-goto-thing-at-cursor.overrideAttrs {
     dependencies = [ self.tlib_vim ];
-  };
-
-  vim-addon-manager = super.vim-addon-manager.overrideAttrs {
-    buildInputs = lib.optional stdenv.hostPlatform.isDarwin Cocoa;
   };
 
   vim-addon-mru = super.vim-addon-mru.overrideAttrs {