Remove version 8_1 checks

Author: arteam

server/src/main/java/org/elasticsearch/transport/TransportStats.java

@@ -69,7 +69,7 @@ public TransportStats(StreamInput in) throws IOException {
         rxSize = in.readVLong();
         txCount = in.readVLong();
         txSize = in.readVLong();
-        if (in.getTransportVersion().onOrAfter(TransportVersions.V_8_1_0) && in.readBoolean()) {
+        if (in.readBoolean()) {
             inboundHandlingTimeBucketFrequencies = new long[HandlingTimeTracker.BUCKET_COUNT];
             for (int i = 0; i < inboundHandlingTimeBucketFrequencies.length; i++) {
                 inboundHandlingTimeBucketFrequencies[i] = in.readVLong();
@@ -98,15 +98,13 @@ public void writeTo(StreamOutput out) throws IOException {
         out.writeVLong(rxSize);
         out.writeVLong(txCount);
         out.writeVLong(txSize);
-        if (out.getTransportVersion().onOrAfter(TransportVersions.V_8_1_0)) {
-            assert (inboundHandlingTimeBucketFrequencies.length > 0) == (outboundHandlingTimeBucketFrequencies.length > 0);
-            out.writeBoolean(inboundHandlingTimeBucketFrequencies.length > 0);
-            for (long handlingTimeBucketFrequency : inboundHandlingTimeBucketFrequencies) {
-                out.writeVLong(handlingTimeBucketFrequency);
-            }
-            for (long handlingTimeBucketFrequency : outboundHandlingTimeBucketFrequencies) {
-                out.writeVLong(handlingTimeBucketFrequency);
-            }
+        assert (inboundHandlingTimeBucketFrequencies.length > 0) == (outboundHandlingTimeBucketFrequencies.length > 0);
+        out.writeBoolean(inboundHandlingTimeBucketFrequencies.length > 0);
+        for (long handlingTimeBucketFrequency : inboundHandlingTimeBucketFrequencies) {
+            out.writeVLong(handlingTimeBucketFrequency);
+        }
+        for (long handlingTimeBucketFrequency : outboundHandlingTimeBucketFrequencies) {
+            out.writeVLong(handlingTimeBucketFrequency);
         }
         if (out.getTransportVersion().onOrAfter(TransportVersions.V_8_8_0)) {
             out.writeMap(transportActionStats, StreamOutput::writeWriteable);