minor change

src/main/java/org/opengroup/osdu/azure/servicebus/SubscriptionClientFactoryImpl.java

@@ -4,7 +4,6 @@ import com.microsoft.azure.servicebus.ReceiveMode;
 import com.microsoft.azure.servicebus.SubscriptionClient;
 import com.microsoft.azure.servicebus.primitives.ConnectionStringBuilder;
 import com.microsoft.azure.servicebus.primitives.ServiceBusException;
-import org.jetbrains.annotations.NotNull;
 import org.opengroup.osdu.azure.cache.SubscriptionClientCache;
 import org.opengroup.osdu.azure.partition.PartitionInfoAzure;
 import org.opengroup.osdu.azure.partition.PartitionServiceClient;
@@ -61,7 +60,7 @@ public class SubscriptionClientFactoryImpl implements ISubscriptionClientFactory
      * @throws InterruptedException Exception thrown by {@link SubscriptionClient}
      * @throws ServiceBusException  Exception thrown by {@link SubscriptionClient}
      */
-    @NotNull SubscriptionClient getSubscriptionClient(final String entityPath, final String serviceBusConnectionString) throws InterruptedException, ServiceBusException {
+    SubscriptionClient getSubscriptionClient(final String entityPath, final String serviceBusConnectionString) throws InterruptedException, ServiceBusException {
         ConnectionStringBuilder connectionStringBuilder = new ConnectionStringBuilder(
                 serviceBusConnectionString,
                 entityPath