remove shut down check before sleep

Author: liustve

aws-opentelemetry-distro/src/amazon/opentelemetry/distro/exporter/otlp/aws/logs/otlp_aws_logs_exporter.py

@@ -114,10 +114,6 @@ def export(self, batch: Sequence[LogData]) -> LogExportResult:
                 resp.reason,
                 backoff_seconds,
             )
-
-            # Make sleep interruptible by checking shutdown status
-            if self._shutdown:
-                return LogExportResult.FAILURE
             sleep(backoff_seconds)
             retry_num += 1