Removed unused captions code.

static/skald.js

@@ -2881,11 +2881,6 @@ function announceUrgent(text) {
  * @param {string|HTMLElement} message
  */
 function addToChatbox(id, peerId, dest, nick, time, privileged, history, kind, message) {
-    if(kind === 'caption') {
-        displayCaption(message);
-        return;
-    }
-
     let row = document.createElement('div');
     row.classList.add('message-row');
     let container = document.createElement('div');
@@ -3046,38 +3041,6 @@ function chatMessageMenu(elt, trigger) {
     openActionMenu(items, trigger, `Actions for message from ${u}`);
 }
 
-/**
- * @param {string|HTMLElement} message
- */
-function setCaption(message) {
-    let container = document.getElementById('captions-container');
-    let captions = document.getElementById('captions');
-    if(!message) {
-        captions.replaceChildren();
-        container.classList.add('invisible');
-    } else {
-        if(message instanceof HTMLElement)
-            captions.replaceChildren(message);
-        else
-            captions.textContent = message;
-        container.classList.remove('invisible');
-    }
-}
-
-let captionsTimer = null;
-
-/**
- * @param {string|HTMLElement} message
- */
-function displayCaption(message) {
-    if(captionsTimer != null) {
-        clearTimeout(captionsTimer);
-        captionsTimer = null;
-    }
-    setCaption(message);
-    captionsTimer = setTimeout(() => setCaption(null), 3000);
-}
-
 /**
  * @param {string|HTMLElement} message
  */