diff --git a/modules/cmb/backend.py b/modules/cmb/backend.py
index 448fdc69..b0e6e296 100644
--- a/modules/cmb/backend.py
+++ b/modules/cmb/backend.py
@@ -26,7 +26,6 @@ from weboob.tools.browser import BrowserIncorrectPassword, BrokenPageError
 from weboob.tools.browser2 import BaseBrowser
 
 from re import match, compile, sub
-from urllib import urlencode
 from decimal import Decimal
 from lxml import etree
 from datetime import date
@@ -100,11 +99,6 @@ class CmbBackend(BaseBackend, ICapBank):
                 'AppleWebKit/531.21.10 (KHTML, like Gecko) Mobile/7B405'
             }
 
-    def sslCallBack(self, cert):
-        pemcert = DER_cert_to_PEM_cert(cert)
-        certhash = sha256(pemcert).hexdigest()
-        return certhash == self.CERTHASH
-
     def login(self):
         data = {
             'codeEspace': 'NO',
diff --git a/weboob/tools/backend.py b/weboob/tools/backend.py
index 1ed1b15a..dfde884b 100644
--- a/weboob/tools/backend.py
+++ b/weboob/tools/backend.py
@@ -328,9 +328,8 @@ class BaseBackend(object):
             tmpproxys = os.environ['https_proxy']
         elif 'HTTPS_PROXY' in os.environ:
             tmpproxys = os.environ['HTTPS_PROXY']
-        print tmpproxys
 
-        if tmpproxy is not None or tmpproxys is not None:
+        if any((tmpproxy, tmpproxys)):
             kwargs['proxy'] = {}
             if tmpproxy is not None:
               kwargs['proxy']['http'] = tmpproxy
diff --git a/weboob/tools/browser/browser.py b/weboob/tools/browser/browser.py
index eaefaa37..1483c37d 100644
--- a/weboob/tools/browser/browser.py
+++ b/weboob/tools/browser/browser.py
@@ -40,7 +40,6 @@ import hashlib
 import time
 import urllib
 import urllib2
-from urlparse import urlsplit
 import mimetypes
 from contextlib import closing
 from gzip import GzipFile