Remove uninstrument & instrument from test setup

The Redis test that performs the tests with the default options, doesn't
need to uninstrument and then instrument the instrumentor. This commit
removes the unnecessary setup code. The setup code is already present at
the top of the file.

Author: tombruijn

instrumentation/opentelemetry-instrumentation-redis/tests/test_redis.py

@@ -153,11 +153,6 @@ def test_query_sanitizer_enabled(self):
         connection = redis.connection.Connection()
         redis_client.connection = connection
 
-        RedisInstrumentor().uninstrument()
-        RedisInstrumentor().instrument(
-            tracer_provider=self.tracer_provider
-        )
-
         with mock.patch.object(redis_client, "connection"):
             redis_client.set("key", "value")