docs: fix lang switcher for gae by deleting obsolete method call

Change-Id: I8d91d18e89d539960c93748557cccc5aabb0a263
diff --git a/tools/droiddoc/templates-sdk/assets/js/docs.js b/tools/droiddoc/templates-sdk/assets/js/docs.js
index 557a242..394dbe4 100644
--- a/tools/droiddoc/templates-sdk/assets/js/docs.js
+++ b/tools/droiddoc/templates-sdk/assets/js/docs.js
@@ -1063,7 +1063,6 @@
     }
   } else {
     // Switch language when on legacy GAE server
-    changeDocLang(lang);
     if (submit) {
       window.location = getBaseUri(location.pathname);
     }