Fix logging

ucloud/imagescanner/main.py

@@ -1,9 +1,7 @@
 import json
 import os
 import subprocess as sp
-import sys
 
-from os.path import isdir
 from os.path import join as join_path
 from ucloud.settings import settings
 from ucloud.shared import shared
@@ -21,19 +19,6 @@ def qemu_img_type(path):
         qemu_img_info = json.loads(qemu_img_info.decode("utf-8"))
         return qemu_img_info["format"]
 
-def check():
-    """ check whether settings are sane, refuse to start if they aren't """
-    if settings['storage']['storage_backend'] == 'filesystem' and not isdir(settings['storage']['image_dir']):
-        sys.exit("You have set STORAGE_BACKEND to filesystem, but "
-                 "{} does not exist. Refusing to start".format(settings['storage']['image_dir'])
-        )
-
-    try:
-        sp.check_output(['which', 'qemu-img'])
-    except Exception:
-        print("qemu-img missing")
-        sys.exit(1)
-
 
 def main():
     # We want to get images entries that requests images to be created