Removing InboundMessage class

Signed-off-by: Vacha Shah <vachshah@amazon.com>

Author: VachaShah

server/src/main/java/org/opensearch/transport/InboundMessage.java

@@ -761,18 +761,6 @@ protected void serverAcceptedChannel(TcpChannel channel) {
      */
     protected abstract void stopInternal();
 
-    /**
-     * @deprecated use {@link #inboundMessage(TcpChannel, ProtocolInboundMessage)}
-     * Handles inbound message that has been decoded.
-     *
-     * @param channel the channel the message is from
-     * @param message the message
-     */
-    @Deprecated(since = "2.14.0", forRemoval = true)
-    public void inboundMessage(TcpChannel channel, InboundMessage message) {
-        inboundMessage(channel, (ProtocolInboundMessage) message);
-    }
-
     /**
      * Handles inbound message that has been decoded.
      *