Python requests send TLS_EMPTY_RENEGOTIATION_INFO_SCSV to Client Hello?

Question

I use Python requests on the client to connect TLS to the server. This is the code I'm using:

import ssl
import requests

from requests.adapters import HTTPAdapter
from requests.packages.urllib3.poolmanager import PoolManager
from requests.packages.urllib3.util import ssl_

CIPHERS = (
    'RSA+AES'
)

class TlsAdapter(HTTPAdapter):

    def __init__(self, ssl_options=0, **kwargs):
        self.ssl_options = ssl_options
        super(TlsAdapter, self).__init__(**kwargs)

    def init_poolmanager(self, *pool_args, **pool_kwargs):
        ctx = ssl_.create_urllib3_context(ciphers=CIPHERS, cert_reqs=ssl.CERT_REQUIRED, options=self.ssl_options)
        print(ssl.PROTOCOL_TLS)
        self.poolmanager = PoolManager(*pool_args,
                                       ssl_context=ctx,
                                       **pool_kwargs)

session = requests.session()
adapter = TlsAdapter(ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1)
session.mount("https://", adapter)
r = session.request('GET', 'https://awesome.com', verify='/etc/ssl/certs/ca-certificates.crt')
print(r)

When I look at the client’s welcome message in Wireshark, I see the optional cipher "TLS_EMPTY_RENEGOTIATION_INFO_SCSV" in the list of ciphers provided by the client.

Can someone tell me what the cipher is and what it does? Is there a way to remove this from the list of ciphers sent in the client's welcome message?

I tried to find this problem, but could not find a suitable answer.

Thank!