remove jsonrpclib dependency

contrib/requirements/requirements.txt

@@ -3,7 +3,6 @@ ecdsa>=0.13
 qrcode
 protobuf
 dnspython
-jsonrpclib-pelix
 qdarkstyle<2.7
 aiorpcx>=0.18,<0.19
 aiohttp>=3.3.0

run_electrum

@@ -61,7 +61,6 @@ def check_imports():
         import certifi
         import qrcode
         import google.protobuf
-        import jsonrpclib
         import aiorpcx
     except ImportError as e:
         sys.exit(f"Error: {str(e)}. Try 'sudo python3 -m pip install <module-name>'")
@@ -70,7 +69,6 @@ def check_imports():
     from google.protobuf import message
     from google.protobuf import reflection
     from google.protobuf import descriptor_pb2
-    from jsonrpclib import SimpleJSONRPCServer
     # make sure that certificates are here
     assert os.path.exists(certifi.where())