vimPlugins.mini-nvim: reduce closure size

Before:

```
$ du -csh result/*
 36K    result/CHANGELOG.md
8.0K    result/CODE_OF_CONDUCT.md
 16K    result/CONTRIBUTING.md
4.0K    result/LICENSE
 16K    result/MAINTAINING.md
4.0K    result/Makefile
 20K    result/README.md
 36K    result/TESTING.md
 56K    result/benchmarks
 12K    result/colors
1.1M    result/doc
4.0K    result/logo.png
2.4M    result/lua
416K    result/readmes
 52K    result/scripts
 11M    result/tests
 15M    total
```

After:

```
$ du -csh result/*
 36K    result/CHANGELOG.md
8.0K    result/CODE_OF_CONDUCT.md
 16K    result/CONTRIBUTING.md
4.0K    result/LICENSE
 16K    result/MAINTAINING.md
 20K    result/README.md
 36K    result/TESTING.md
 12K    result/colors
1.1M    result/doc
4.0K    result/logo.png
2.4M    result/lua
3.6M    total
```

Author: thiagokokada

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

@@ -1761,6 +1761,13 @@ in
     dependencies = [ self.plenary-nvim ];
   };
 
+  mini-nvim = super.mini-nvim.overrideAttrs {
+    # reduce closure size
+    postInstall = ''
+      rm -rf $out/{Makefile,benchmarks,readmes,tests,scripts}
+    '';
+  };
+
   git-conflict-nvim = super.git-conflict-nvim.overrideAttrs {
     # TODO: Remove after next fixed version
     # https://github.com/akinsho/git-conflict.nvim/issues/103