Simplify code, test=develop

python/paddle/fluid/dygraph/dygraph_to_static/convert_call_func.py

@@ -65,19 +65,12 @@ def is_unsupported(func):
     Checks whether the func is supported by dygraph to static graph.
     """
 
-    func_in_builtin_modules = False
     for m in BUILTIN_LIKELY_MODULES:
         for v in m.__dict__.values():
             func_in_dict = func == v
             if isinstance(func_in_dict, (list, numpy.ndarray)):
                 func_in_dict = any(func_in_dict)
             if func_in_dict:
-                func_in_builtin_modules = True
-                break
-        if func_in_builtin_modules:
-            break
-
-    if func_in_builtin_modules:
                 translator_logger.log(
                     2,
                     "Whitelist: {} is part of built-in module and does not have to be transformed.".