Do not use article date from git

pelicanconf.py

@@ -34,7 +34,7 @@ AUTHOR_FEED_ATOM = None
 AUTHOR_FEED_RSS = None
 
 PLUGIN_PATHS = ["plugins"]
-PLUGINS = ["i18n_subsites", "filetime_from_git", "sitemap", "summary", "jinja2content"]
+PLUGINS = ["i18n_subsites", "sitemap", "summary", "jinja2content"]
 MARKDOWN = {
     "extension_configs": {
         "markdown.extensions.attr_list": {},