js: drop jquery-timeout plugin.

Replace with `Danbooru.Utility.delay`.

app/javascript/src/javascripts/posts.js.erb

@@ -67,16 +67,18 @@ Post.initialize_gestures = function() {
   $body.data("hammer", hammer);
 
   if (hasPrev) {
-    hammer.on("swiperight", function(e) {
+    hammer.on("swiperight", async function(e) {
       $("body").css({"transition-timing-function": "ease", "transition-duration": "0.2s", "opacity": "0", "transform": "translateX(150%)"});
-      $.timeout(200).done(function() {Post.swipe_prev(e)});
+      await Danbooru.Utility.delay(200);
+      Post.swipe_prev(e);
     });
   }
 
   if (hasNext) {
-    hammer.on("swipeleft", function(e) {
+    hammer.on("swipeleft", async function(e) {
       $("body").css({"transition-timing-function": "ease", "transition-duration": "0.2s", "opacity": "0", "transform": "translateX(-150%)"});
-      $.timeout(200).done(function() {Post.swipe_next(e)});
+      await Danbooru.Utility.delay(200);
+      Post.swipe_next(e);
     });
   }
 }

app/javascript/src/javascripts/utility.js

@@ -1,5 +1,9 @@
 let Utility = {};
 
+Utility.delay = function(milliseconds) {
+  return new Promise(resolve => setTimeout(resolve, milliseconds));
+}
+
 Utility.meta = function(key) {
   return $("meta[name=" + key + "]").attr("content");
 }

app/javascript/vendor/jquery-timeout.js

@@ -1,47 +0,0 @@
-/**
- * jquery.timeout.js
- *
- * Copyright (c) 2011 Thomas Kemmer <tkemmer@computer.org>
- *
- * http://code.google.com/p/jquery-timeout/
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
- * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-;(function($) {
-    $.timeout = function(delay) {
-        var deferred = $.Deferred(function(deferred) {
-            deferred.timeoutID = window.setTimeout(function() {
-                deferred.resolve();
-            }, delay);
-
-            deferred.fail(function() {
-                window.clearTimeout(deferred.timeoutID);
-            });
-        });
-
-        return $.extend(deferred.promise(), {
-            clear: function() {
-                deferred.reject();
-            }
-        });
-    };
-})(jQuery);