Remove event-bus write handler documentation.

Author: vietj

vertx-core/src/main/asciidoc/http.adoc

@@ -2219,19 +2219,6 @@ The {@link io.vertx.core.http.WebSocket} instance is also a {@link io.vertx.core
 When using a WebSocket as a write stream or a read stream it can only be used with WebSockets connections that are
 used with binary frames that are no split over multiple frames.
 
-==== Event bus handlers
-
-Every WebSocket can register two handlers on the event bus, and when any data are received in these handlers,
-it writes the data to itself. Those are local subscriptions, not reachable from other clustered nodes.
-
-This enables you to write data to a WebSocket which is potentially in a completely different verticle sending data
-to the address of that handler.
-
-This feature is disabled by default, however you can enable it using {@link io.vertx.core.http.HttpServerOptions#setRegisterWebSocketWriteHandlers} or {@link io.vertx.core.http.WebSocketConnectOptions#setRegisterWriteHandlers}.
-
-The addresses of the handlers are given by {@link io.vertx.core.http.WebSocket#binaryHandlerID()} and
-{@link io.vertx.core.http.WebSocket#textHandlerID()}.
-
 === Using a proxy for HTTP/HTTPS connections
 
 The {@link io.vertx.core.http.HttpClient} supports accessing HTTP/HTTPS URLs via an HTTP proxy (e.g. Squid), a _SOCKS4a_, or a _SOCKS5_ proxy.

vertx-core/src/main/asciidoc/net.adoc

@@ -131,17 +131,6 @@ You can set an {@link io.vertx.core.net.NetServer#exceptionHandler(io.vertx.core
 exceptions that happens before the connection is passed to the {@link io.vertx.core.net.NetServer#connectHandler(io.vertx.core.Handler)}
 , e.g during the TLS handshake.
 
-=== Event bus write handler
-
-Every socket can register a handler on the event bus, and when any buffers are received in this handler,
-it writes them to itself. Those are local subscriptions, not reachable from other clustered nodes.
-
-This enables you to write data to a socket which is potentially in a completely different verticle by sending the buffer to the address of that handler.
-
-This feature is disabled by default, however you can enable it using {@link io.vertx.core.net.NetServerOptions#setRegisterWriteHandler} or {@link io.vertx.core.net.NetClientOptions#setRegisterWriteHandler}.
-
-The address of the handler is given by {@link io.vertx.core.net.NetSocket#writeHandlerID()}.
-
 === Local and remote addresses
 
 The local address of a {@link io.vertx.core.net.NetSocket} can be retrieved using {@link io.vertx.core.net.NetSocket#localAddress()}.