Rolled back my failed experiment

transport/src/main/java/com/strategyobject/substrateclient/transport/ws/WsProvider.java

@@ -47,7 +47,6 @@ class WsStateAwaiting {
     private String method;
     private List<Object> params;
     private SubscriptionHandler subscription;
-    private Map<String, String> mdc;
 }
 
 @Slf4j
@@ -237,7 +236,7 @@ private CompletableFuture<RpcObject> send(String method,
         log.debug("Calling {} {}, {}, {}, {}", id, method, params, json, subscription);
 
         val whenResponseReceived = new CompletableFuture<RpcObject>();
-        this.handlers.put(id, new WsStateAwaiting(whenResponseReceived, method, params, subscription, MDC.getCopyOfContextMap()));
+        this.handlers.put(id, new WsStateAwaiting(whenResponseReceived, method, params, subscription));
 
         return CompletableFuture.runAsync(() -> ws.send(json), webSocketSendExecutorService)
                 .whenCompleteAsync((_res, ex) -> {
@@ -436,7 +435,6 @@ private void onSocketMessageResult(JsonRpcResponseSingle response) {
         }
 
         try {
-            MDC.setContextMap(handler.getMdc());
             val result = response.getResult();
             // first send the result - in case of subs, we may have an update
             // immediately if we have some queued results already
@@ -461,8 +459,6 @@ private void onSocketMessageResult(JsonRpcResponseSingle response) {
             }
         } catch (Exception ex) {
             handler.getCallback().completeExceptionally(ex);
-        }finally{
-            MDC.clear();
         }
 
         this.handlers.remove(id);