Revert "[Security] fix download security problem (PaddlePaddle#61162) (…

…PaddlePaddle#61388)"

This reverts commit 5f3bbeb.

python/paddle/dataset/common.py

@@ -18,7 +18,6 @@
 import importlib
 import os
 import pickle
-import re
 import shutil
 import sys
 import tempfile
@@ -72,11 +71,6 @@ def md5file(fname):
 
 
 def download(url, module_name, md5sum, save_name=None):
-    module_name = re.match("^[a-zA-Z0-9_/\\-]+$", module_name).group()
-    if isinstance(save_name, str):
-        save_name = re.match(
-            "^(?:(?!\\.\\.)[a-zA-Z0-9_/\\.-])+$", save_name
-        ).group()
     dirname = os.path.join(DATA_HOME, module_name)
     if not os.path.exists(dirname):
         os.makedirs(dirname)