fix: remove arbitrary timeout context for request processing on SSE stream

Author: havasik

client/transport/streamable_http.go

@@ -406,13 +406,6 @@ func (c *StreamableHTTP) handleSSEResponse(ctx context.Context, reader io.ReadCl
 	// Create a channel for this specific request
 	responseChan := make(chan *JSONRPCResponse, 1)
 
-	// Add timeout context for request processing if not already set
-	if deadline, ok := ctx.Deadline(); !ok || time.Until(deadline) > 30*time.Second {
-		var cancel context.CancelFunc
-		ctx, cancel = context.WithTimeout(ctx, 30*time.Second)
-		defer cancel()
-	}
-
 	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()