use certifi directly instead of requests

run_electrum

@@ -44,7 +44,7 @@ def check_imports():
         import dns
         import pyaes
         import ecdsa
-        import requests
+        import certifi
         import qrcode
         import google.protobuf
         import jsonrpclib
@@ -58,7 +58,7 @@ def check_imports():
     from google.protobuf import descriptor_pb2
     from jsonrpclib import SimpleJSONRPCServer
     # make sure that certificates are here
-    assert os.path.exists(requests.utils.DEFAULT_CA_BUNDLE_PATH)
+    assert os.path.exists(certifi.where())
 
 
 if not is_android: