tp: Add time module to stdlib

Bug:324801834
Change-Id: I410038c244e9c704f55878f1f063eef646a186f0
diff --git a/tools/gen_stdlib_docs_json.py b/tools/gen_stdlib_docs_json.py
index 513b932..8ae6044 100755
--- a/tools/gen_stdlib_docs_json.py
+++ b/tools/gen_stdlib_docs_json.py
@@ -71,6 +71,11 @@
     import_key = path.split(".sql")[0].replace("/", ".")
 
     docs = parse_file(path, sql)
+
+    # Some modules (i.e `deprecated`) should not generate docs.
+    if not docs:
+      continue
+
     if len(docs.errors) > 0:
       for e in docs.errors:
         print(e)