Replace animate.css with a smaller subset of animations.

As discussed in #15667.

CHANGELOG

@@ -72,6 +72,7 @@ v 8.7.3
   - Merge request widget displays TeamCity build state and code coverage correctly again.
   - Fix the line code when importing PR review comments from GitHub. !4010
   - Wikis are now initialized on legacy projects when checking repositories
+  - Remove animate.css in favor of a smaller subset of animations. !3937 (Connor Shea)
 
 v 8.7.2
   - The "New Branch" button is now loaded asynchronously

app/assets/stylesheets/application.scss

@@ -10,7 +10,6 @@
  *= require dropzone/basic
  *= require cal-heatmap
  *= require cropper.css
- *= require animate
 */
 
 /*

app/assets/stylesheets/framework.scss

@@ -5,6 +5,7 @@
 @import 'framework/tw_bootstrap';
 @import "framework/layout";
 
+@import "framework/animations.scss";
 @import "framework/avatar.scss";
 @import "framework/blocks.scss";
 @import "framework/buttons.scss";

app/assets/stylesheets/framework/animations.scss

+// This file is based off animate.css 3.5.1, available here:
+// https://github.com/daneden/animate.css/blob/3.5.1/animate.css
+// 
+// animate.css - http://daneden.me/animate
+// Version - 3.5.1
+// Licensed under the MIT license - http://opensource.org/licenses/MIT
+// 
+// Copyright (c) 2016 Daniel Eden
+
+.animated {
+  -webkit-animation-duration: 1s;
+  animation-duration: 1s;
+  -webkit-animation-fill-mode: both;
+  animation-fill-mode: both;
+}
+
+.animated.infinite {
+  -webkit-animation-iteration-count: infinite;
+  animation-iteration-count: infinite;
+}
+
+.animated.hinge {
+  -webkit-animation-duration: 2s;
+  animation-duration: 2s;
+}
+
+.animated.flipOutX,
+.animated.flipOutY,
+.animated.bounceIn,
+.animated.bounceOut {
+  -webkit-animation-duration: .75s;
+  animation-duration: .75s;
+}
+
+@-webkit-keyframes pulse {
+  from {
+    -webkit-transform: scale3d(1, 1, 1);
+    transform: scale3d(1, 1, 1);
+  }
+
+  50% {
+    -webkit-transform: scale3d(1.05, 1.05, 1.05);
+    transform: scale3d(1.05, 1.05, 1.05);
+  }
+
+  to {
+    -webkit-transform: scale3d(1, 1, 1);
+    transform: scale3d(1, 1, 1);
+  }
+}
+
+@keyframes pulse {
+  from {
+    -webkit-transform: scale3d(1, 1, 1);
+    transform: scale3d(1, 1, 1);
+  }
+
+  50% {
+    -webkit-transform: scale3d(1.05, 1.05, 1.05);
+    transform: scale3d(1.05, 1.05, 1.05);
+  }
+
+  to {
+    -webkit-transform: scale3d(1, 1, 1);
+    transform: scale3d(1, 1, 1);
+  }
+}
+
+.pulse {
+  -webkit-animation-name: pulse;
+  animation-name: pulse;
+}