[Core] Remove opencensus dev dependencies (Azure#39453)

Signed-off-by: Paul Van Eck <[email protected]>

Author: pvaneck

sdk/core/azure-core/dev_requirements.txt

@@ -3,11 +3,8 @@ requests
 # Aiohttp 3.8.6 triggers https://github.com/aio-libs/aiohttp/issues/4581 on pypy for some reasons
 aiohttp<3.8.6 ; platform_python_implementation == "PyPy"
 aiohttp ; platform_python_implementation != "PyPy"
-opencensus>=0.6.0
-opencensus-ext-azure
-opencensus-ext-threading
 -e ../../../tools/azure-sdk-tools
 -e tests/testserver_tests/coretestserver
 pytest-trio
 azure-storage-blob
-azure-data-tables
+azure-data-tables

sdk/core/azure-core/tests/conftest.py

@@ -34,16 +34,6 @@
 from rest_client import MockRestClient
 import sys
 
-# If opencensus is loadable while doing these tests, register an empty tracer to avoid this:
-# https://github.com/census-instrumentation/opencensus-python/issues/442
-try:
-    from azure.core.tracing.ext.opencensus_span import OpenCensusSpan
-    from opencensus.trace.tracer import Tracer
-
-    Tracer()
-except ImportError:
-    pass
-
 
 def is_port_available(port_num):
     req = urllib.request.Request("http://localhost:{}/health".format(port_num))