Remove workaround from TransportHandshakerTests (#123587)

TransportHandshakerTests had a workaround for multi-project's fake
transport version. Now that it's a real transport version we can remove
the workaround

Author: tvernum

server/src/test/java/org/elasticsearch/transport/TransportHandshakerTests.java

@@ -18,7 +18,6 @@
 import org.elasticsearch.cluster.node.DiscoveryNodeUtils;
 import org.elasticsearch.common.io.stream.BytesStreamOutput;
 import org.elasticsearch.common.io.stream.StreamInput;
-import org.elasticsearch.core.FixForMultiProject;
 import org.elasticsearch.core.Strings;
 import org.elasticsearch.core.TimeValue;
 import org.elasticsearch.core.UpdateForV10;
@@ -304,8 +303,7 @@ public void testHandshakeRequestFutureVersionsCompatibility() throws IOException
         TaskId.EMPTY_TASK_ID.writeTo(futureHandshake);
         final var extraDataSize = between(0, 1024);
         try (BytesStreamOutput internalMessage = new BytesStreamOutput()) {
-            @FixForMultiProject(description = "update to between(0, 100) when multi-projects get a real transport version")
-            final var futureTransportVersionId = TransportVersion.current().id() + between(0, 1);
+            final var futureTransportVersionId = TransportVersion.current().id() + between(0, 100);
             internalMessage.writeVInt(futureTransportVersionId);
             internalMessage.writeString(buildVersion);
             lengthCheckingHandshake.writeBytesReference(internalMessage.bytes());