{Core} aaz: Remove requests in main thread (#32824)

Author: necusjz

src/azure-cli-core/azure/cli/core/aaz/_poller.py

@@ -12,9 +12,6 @@
 from azure.core.polling.base_polling import LROBasePolling
 from azure.core.tracing.common import with_current_context
 from azure.core.tracing.decorator import distributed_trace
-# import requests in main thread to resolve import deadlock between threads in python
-# reference https://github.com/psf/requests/issues/2925 and https://github.com/Azure/azure-cli/issues/26272
-import requests  # pylint: disable=unused-import
 
 _LOGGER = logging.getLogger(__name__)