remove docs folder

doc/events/websocket_message.md

@@ -1,26 +0,0 @@
----
-module: [kind=event] websocket_message
----
-
-The @{websocket_message} event is fired when a message is received on an open WebSocket connection.
-
-This event is normally handled by @{http.Websocket.receive}, but it can also be pulled manually.
-
-## Return Values
-1. @{string}: The event name.
-2. @{string}: The URL of the WebSocket.
-3. @{string}: The contents of the message.
-
-## Example
-Prints a message sent by a WebSocket:
-```lua
-local myURL = "wss://example.tweaked.cc/echo"
-local ws = http.websocket(myURL)
-ws.send("Hello!")
-local event, url, message
-repeat
-    event, url, message = os.pullEvent("websocket_message")
-until url == myURL
-print("Received message from " .. url .. " with contents " .. message)
-ws.close()
-```