feat: Telemetry in A2A Python SDK

Author: rajeshvelicheti

src/a2a/utils/telemetry.py

@@ -56,7 +56,6 @@ def internal_method(self):
 import functools
 import inspect
 import logging
-import traceback
 
 from opentelemetry import trace
 from opentelemetry.trace import SpanKind as _SpanKind