fixed lint issue

Author: AsakerMohd

aws-opentelemetry-distro/tests/amazon/opentelemetry/distro/test_aws_lambda_span_processor.py

@@ -5,7 +5,7 @@
 
 from amazon.opentelemetry.distro._aws_attribute_keys import AWS_TRACE_LAMBDA_FLAG_MULTIPLE_SERVER
 from amazon.opentelemetry.distro.aws_lambda_span_processor import AwsLambdaSpanProcessor
-from opentelemetry.context import Context, get_value, set_value
+from opentelemetry.context import Context, set_value
 from opentelemetry.trace import Span, SpanContext, SpanKind
 from opentelemetry.trace.propagation import _SPAN_KEY