Revert user prompt before downloading files (#2521)

May be problematic for unattended runs.

PaddleCV/object_detection/ppdet/utils/download.py

@@ -16,10 +16,8 @@ from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
 
-import six
 
 import os
-import sys
 import shutil
 import requests
 import tqdm
@@ -27,8 +25,6 @@ import hashlib
 import tarfile
 import zipfile
 
-from .cli import ColorTTY
-
 import logging
 logger = logging.getLogger(__name__)
 
@@ -142,17 +138,6 @@ def _download(url, path, md5sum=None):
     fullname = os.path.join(path, fname)
     retry_cnt = 0
 
-    print("will download file to {}, proceed? {}".format(
-        fullname, ColorTTY().green("[Y/n]")))
-    yes = {'yes', 'y', ''}
-    if six.PY2:
-        choice = raw_input().lower()
-    else:
-        choice = input().lower()
-    if choice not in yes:
-        print('download aborted....')
-        sys.exit(0)
-
     while not (os.path.exists(fullname) and _md5check(fullname, md5sum)):
         if retry_cnt < DOWNLOAD_RETRY_LIMIT:
             retry_cnt += 1