diff --git a/src/meta/js.js b/src/meta/js.js
index b1ee976d14..05ecd482f3 100644
--- a/src/meta/js.js
+++ b/src/meta/js.js
@@ -3,12 +3,7 @@
 const path = require('path');
 const fs = require('fs');
 const util = require('util');
-let mkdirp = require('mkdirp');
-// TODO: remove in 1.16.0
-if (!mkdirp.hasOwnProperty('native')) {
-	mkdirp = util.promisify(mkdirp);
-}
-
+const mkdirp = require('mkdirp');
 const rimraf = require('rimraf');
 
 const rimrafAsync = util.promisify(rimraf);
diff --git a/src/middleware/header.js b/src/middleware/header.js
index b0ecf295c5..1cd7838625 100644
--- a/src/middleware/header.js
+++ b/src/middleware/header.js
@@ -101,7 +101,6 @@ middleware.renderHeader = async function renderHeader(req, res, data) {
 	results.user.isEmailConfirmSent = !!results.isEmailConfirmSent;
 
 	templateValues.bootswatchSkin = (parseInt(meta.config.disableCustomUserSkins, 10) !== 1 ? res.locals.config.bootswatchSkin : '') || meta.config.bootswatchSkin || '';
-	templateValues.config.bootswatchSkin = templateValues.bootswatchSkin || 'noskin';	// TODO remove in v1.12.0+
 	templateValues.browserTitle = results.browserTitle;
 	({
 		navigation: templateValues.navigation,
diff --git a/src/middleware/user.js b/src/middleware/user.js
index 0d154b506c..4adff804d5 100644
--- a/src/middleware/user.js
+++ b/src/middleware/user.js
@@ -1,11 +1,9 @@
 'use strict';
 
-const nconf = require('nconf');
 const winston = require('winston');
 const passport = require('passport');
 const util = require('util');
 
-const meta = require('../meta');
 const user = require('../user');
 const privileges = require('../privileges');
 const plugins = require('../plugins');
@@ -209,47 +207,6 @@ module.exports = function (middleware) {
 		controllers.helpers.redirect(res, path);
 	});
 
-	middleware.isAdmin = helpers.try(async (req, res, next) => {
-		// TODO: Remove in v1.16.0
-		winston.warn('[middleware] middleware.isAdmin deprecated, use middleware.admin.checkPrivileges instead');
-
-		const isAdmin = await user.isAdministrator(req.uid);
-
-		if (!isAdmin) {
-			return controllers.helpers.notAllowed(req, res);
-		}
-		const hasPassword = await user.hasPassword(req.uid);
-		if (!hasPassword) {
-			return next();
-		}
-
-		const loginTime = req.session.meta ? req.session.meta.datetime : 0;
-		const adminReloginDuration = meta.config.adminReloginDuration * 60000;
-		const disabled = meta.config.adminReloginDuration === 0;
-		if (disabled || (loginTime && parseInt(loginTime, 10) > Date.now() - adminReloginDuration)) {
-			const timeLeft = parseInt(loginTime, 10) - (Date.now() - adminReloginDuration);
-			if (req.session.meta && timeLeft < Math.min(300000, adminReloginDuration)) {
-				req.session.meta.datetime += Math.min(300000, adminReloginDuration);
-			}
-
-			return next();
-		}
-
-		let returnTo = req.path;
-		if (nconf.get('relative_path')) {
-			returnTo = req.path.replace(new RegExp(`^${nconf.get('relative_path')}`), '');
-		}
-		returnTo = returnTo.replace(/^\/api/, '');
-
-		req.session.returnTo = returnTo;
-		req.session.forceLogin = 1;
-		if (res.locals.isAPI) {
-			controllers.helpers.formatApiResponse(401, res);
-		} else {
-			res.redirect(`${nconf.get('relative_path')}/login?local=1`);
-		}
-	});
-
 	middleware.requireUser = function (req, res, next) {
 		if (req.loggedIn) {
 			return next();
diff --git a/src/routes/user.js b/src/routes/user.js
index ae0d1927b9..763b8189c4 100644
--- a/src/routes/user.js
+++ b/src/routes/user.js
@@ -1,8 +1,5 @@
 'use strict';
 
-const winston = require('winston');
-const nconf = require('nconf');
-
 const helpers = require('./helpers');
 
 const { setupPageRoute } = helpers;
@@ -48,14 +45,6 @@ module.exports = function (app, name, middleware, controllers) {
 	setupPageRoute(app, `/${name}/:userslug/consent`, middleware, accountMiddlewares, controllers.accounts.consent.get);
 	setupPageRoute(app, `/${name}/:userslug/blocks`, middleware, accountMiddlewares, controllers.accounts.blocks.getBlocks);
 	setupPageRoute(app, `/${name}/:userslug/sessions`, middleware, accountMiddlewares, controllers.accounts.sessions.get);
-	app.delete('/api/user/:userslug/session/:uuid', [middleware.exposeUid], (req, res, next) => {
-		// TODO: Remove this entire route in v1.16.0
-		winston.warn('[router] `/api/user/:userslug/session/:uuid` has been deprecated, use `DELETE /api/v3/users/:uid/sessions/:uuid` or `DELETE /api/v3/users/bySlug/:userslug/sessions/:uuid` instead');
-		if (!res.locals.uid) {
-			return next();
-		}
-		res.redirect(`${nconf.get('relative_path')}/api/v3/users/${res.locals.uid}/sessions/${req.params.uuid}`);
-	});
 
 	setupPageRoute(app, '/notifications', middleware, [middleware.ensureLoggedIn], controllers.accounts.notifications.get);
 	setupPageRoute(app, `/${name}/:userslug/chats/:roomid?`, middleware, middlewares, controllers.accounts.chats.get);