[FLINK-12527][runtime] Remove GLOBAL_VERSION_UPDATER in ExecutionGraph

This closes apache#10058.

flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/ExecutionGraph.java

@@ -118,7 +118,6 @@
 import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.atomic.AtomicInteger;
-import java.util.concurrent.atomic.AtomicLongFieldUpdater;
 import java.util.stream.Collectors;
 
 import static org.apache.flink.util.Preconditions.checkNotNull;
@@ -170,11 +169,6 @@
  */
 public class ExecutionGraph implements AccessExecutionGraph {
 
-	/** In place updater for the execution graph's current global recovery version.
-	 * Avoids having to use an AtomicLong and thus makes the frequent read access a bit faster */
-	private static final AtomicLongFieldUpdater<ExecutionGraph> GLOBAL_VERSION_UPDATER =
-			AtomicLongFieldUpdater.newUpdater(ExecutionGraph.class, "globalModVersion");
-
 	/** The log object used for debugging. */
 	static final Logger LOG = LoggerFactory.getLogger(ExecutionGraph.class);
 
@@ -1373,7 +1367,7 @@ private boolean transitionState(JobStatus current, JobStatus newState, Throwable
 
 	private long incrementGlobalModVersion() {
 		incrementRestarts();
-		return GLOBAL_VERSION_UPDATER.incrementAndGet(this);
+		return ++globalModVersion;
 	}
 
 	public void incrementRestarts() {