Remove last uses of mock (#163)

Author: s-t-e-v-e-n-k

setup.py

@@ -63,7 +63,6 @@
             "pytest-asyncio",
             "pytest-httpserver",
             "trustme",
-            "mock",
             "requests",
             "aiohttp",
             "httpx",

tests/node/test_http_requests.py

@@ -18,10 +18,10 @@
 import gzip
 import ssl
 import warnings
+from unittest.mock import Mock, patch
 
 import pytest
 import requests
-from mock import Mock, patch
 from requests.auth import HTTPBasicAuth
 
 from elastic_transport import NodeConfig, RequestsHttpNode

tests/node/test_http_urllib3.py

@@ -19,10 +19,10 @@
 import re
 import ssl
 import warnings
+from unittest.mock import Mock, patch
 
 import pytest
 import urllib3
-from mock import Mock, patch
 from urllib3.response import HTTPHeaderDict
 
 from elastic_transport import NodeConfig, TransportError, Urllib3HttpNode