Remove some forum topic related features (#527)

app/public/static/js/topic_discard.js

@@ -1,33 +0,0 @@
-// @author rubenwardy
-// @license magnet:?xt=urn:btih:1f739d935676111cfff4b4693e3816e664797050&dn=gpl-3.0.txt GPL-v3-or-Later
-
-"use strict";
-
-document.querySelectorAll(".topic-discard").forEach(ele => ele.addEventListener("click", (e) => {
-	const row = ele.parentNode.parentNode;
-	const tid = ele.getAttribute("data-tid");
-	const discard = !row.classList.contains("discardtopic");
-	fetch(new Request("/api/topic_discard/?tid=" + tid +
-			"&discard=" + (discard ? "true" : "false"), {
-		method: "post",
-		credentials: "same-origin",
-		headers: {
-			"Accept": "application/json",
-			"X-CSRFToken": csrf_token,
-		},
-	})).then(function(response) {
-		response.text().then(function(txt) {
-			if (JSON.parse(txt).discarded) {
-				row.classList.add("discardtopic");
-				ele.classList.remove("btn-danger");
-				ele.classList.add("btn-success");
-				ele.innerText = "Show";
-			} else {
-				row.classList.remove("discardtopic");
-				ele.classList.remove("btn-success");
-				ele.classList.add("btn-danger");
-				ele.innerText = "Discard";
-			}
-		}).catch(console.error);
-	}).catch(console.error);
-}));