Remove deprecated strict poolmanager kwarg

Author: hssyoo

awscli/botocore/httpsession.py

@@ -339,7 +339,6 @@ def _proxies_kwargs(self, **kwargs):
 
     def _get_pool_manager_kwargs(self, **extra_kwargs):
         pool_manager_kwargs = {
-            'strict': True,
             'timeout': self._timeout,
             'maxsize': self._max_pool_connections,
             'ssl_context': self._get_ssl_context(),

tests/unit/botocore/test_http_session.py

@@ -150,7 +150,6 @@ def assert_request_sent(
 
     def _assert_manager_call(self, manager, *assert_args, **assert_kwargs):
         call_kwargs = {
-            'strict': True,
             'maxsize': mock.ANY,
             'timeout': mock.ANY,
             'ssl_context': mock.ANY,