[DS]

If you want to block that message, you will need to use the engine module.

Here's how I'd do it:

#include <amxmodx>
#include <engine>

public plugin_init() {
    register_message(get_user_msgid("TextMsg"), "hook_TextMsg") // Hook TextMsg message to function
}

public hook_TextMsg(msgid, msgdest, msgargs) {
    new message[32]
    get_msg_arg_string(2, message, 31) // Get text message
    
    // If text message = "Game will restart in X seconds" then block the message
    if (equal(message, "#Game_will_restart_in")
        return PLUGIN_HANDLED // Blocks message
    
    return PLUGIN_CONTINUE // Lets other TextMsg messages go through
}

register_message basically lets you hook a function to any game messages. In this case the "game will restart in" is done by the TextMsg message. And then you can block it by returning PLUGIN_HANDLED or let a message continue by returning PLUGIN_CONTINUE. In this case I only block the TextMsg when the message is about the game restarting, otherwise it will display all other text messages such as Counter-Terrorists Win.