gradle goJF formatting executed

Change-Id: I9b9aa3c7aa64adc0e5315eac56cdd500bb08ac6d

Author: GABOR_SELMECI

src/main/java/com/cisco/trex/stateful/TRexAstfClient.java

@@ -26,7 +26,6 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
-import java.util.Optional;
 import java.util.Set;
 import java.util.stream.Collectors;
 import java.util.stream.StreamSupport;