s/ch/zh/g as it is the correct ISO code (#3315)

docs/tools/build.py

@@ -171,7 +171,7 @@ def build(args):
 
 if __name__ == '__main__':
     arg_parser = argparse.ArgumentParser()
-    arg_parser.add_argument('--lang', default='en,ru,ch,fa')
+    arg_parser.add_argument('--lang', default='en,ru,zh,fa')
     arg_parser.add_argument('--docs-dir', default='.')
     arg_parser.add_argument('--theme-dir', default='mkdocs-material-theme')
     arg_parser.add_argument('--output-dir', default='build')

docs/tools/mkdocs-material-theme/partials/language/ch.html

@@ -1,18 +0,0 @@
-{% macro t(key) %}{{ {
-  "language": "en",
-  "clipboard.copy": "Copy to clipboard",
-  "clipboard.copied": "Copied to clipboard",
-  "edit.link.title": "Edit this page",
-  "footer.previous": "Previous",
-  "footer.next": "Next",
-  "meta.comments": "Comments",
-  "meta.source": "Source",
-  "search.placeholder": "Search",
-  "search.result.placeholder": "Type to start searching",
-  "search.result.none": "No matching documents",
-  "search.result.one": "1 matching document",
-  "search.result.other": "# matching documents",
-  "search.tokenizer": "[\s\-]+",
-  "source.link.title": "Go to repository",
-  "toc.title": "Table of contents"
-}[key] }}{% endmacro %}