WEBSOCKET.md: remove dead link

docs/WEBSOCKET.md

@@ -109,10 +109,9 @@ Ideas:
 
 ## Why not libWebSocket
 
-[libWebSocket](https://libWebSockets.org/) is said to be a solid, fast and
-efficient WebSocket library with a vast amount of users. My plan was
-originally to build upon it to skip having to implement the low level parts of
-WebSocket myself.
+libWebSocket is said to be a solid, fast and efficient WebSocket library with
+a vast amount of users. My plan was originally to build upon it to skip having
+to implement the low level parts of WebSocket myself.
 
 Here are the reasons why I have decided to move forward with WebSocket in
 curl **without using libWebSocket**: