Minor: Comment temporary function for documentation migration (#13669)

* Minor: Comment temporary function for documentation migration

* Minor: Comment temporary function for documentation migration

Author: comphead

datafusion/core/src/bin/print_functions_docs.rs

@@ -88,6 +88,7 @@ fn print_window_docs() -> Result<String> {
 // the migration of UDF documentation generation from code based
 // to attribute based
 // To be removed
+#[allow(dead_code)]
 fn save_doc_code_text(documentation: &Documentation, name: &str) {
     let attr_text = documentation.to_doc_attribute();
 
@@ -182,7 +183,7 @@ fn print_docs(
             };
 
             // Temporary for doc gen migration, see `save_doc_code_text` comments
-            save_doc_code_text(documentation, &name);
+            // save_doc_code_text(documentation, &name);
 
             // first, the name, description and syntax example
             let _ = write!(