fix(carousel): remove version checks

- Make use of `$animateCss` directly since a shell service was introduced in Angular proper

Closes #4122
Closes #4774

Author: wesleycho

src/carousel/carousel.js

@@ -3,7 +3,6 @@ angular.module('ui.bootstrap.carousel', [])
 .controller('UibCarouselController', ['$scope', '$element', '$interval', '$animate', function($scope, $element, $interval, $animate) {
   var self = this,
     slides = self.slides = $scope.slides = [],
-    NEW_ANIMATE = angular.version.minor >= 4,
     SLIDE_DIRECTION = 'uib-slideDirection',
     currentIndex = -1,
     currentInterval, isPlaying;
@@ -37,18 +36,12 @@ angular.module('ui.bootstrap.carousel', [])
       }
 
       $scope.$currentTransition = true;
-      if (NEW_ANIMATE) {
-        $animate.on('addClass', slide.$element, function(element, phase) {
-          if (phase === 'close') {
-            $scope.$currentTransition = null;
-            $animate.off('addClass', element);
-          }
-        });
-      } else {
-        slide.$element.one('$animate:close', function closeFn() {
+      $animate.on('addClass', slide.$element, function(element, phase) {
+        if (phase === 'close') {
           $scope.$currentTransition = null;
-        });
-      }
+          $animate.off('addClass', element);
+        }
+      });
     }
 
     self.currentSlide = slide;
@@ -250,14 +243,9 @@ angular.module('ui.bootstrap.carousel', [])
 })
 
 .animation('.item', [
-         '$injector', '$animate',
-function ($injector, $animate) {
-  var SLIDE_DIRECTION = 'uib-slideDirection',
-    $animateCss = null;
-
-  if ($injector.has('$animateCss')) {
-    $animateCss = $injector.get('$animateCss');
-  }
+        '$animate', '$animateCss',
+function($animate,   $animateCss) {
+  var SLIDE_DIRECTION = 'uib-slideDirection';
 
   function removeClass(element, className, callback) {
     element.removeClass(className);
@@ -277,20 +265,11 @@ function ($injector, $animate) {
           directionClass + ' ' + direction, done);
         element.addClass(direction);
 
-        if ($animateCss) {
-          $animateCss(element, {addClass: directionClass})
-            .start()
-            .done(removeClassFn);
-        } else {
-          $animate.addClass(element, directionClass).then(function () {
-            if (!stopped) {
-              removeClassFn();
-            }
-            done();
-          });
-        }
+        $animateCss(element, {addClass: directionClass})
+          .start()
+          .done(removeClassFn);
 
-        return function () {
+        return function() {
           stopped = true;
         };
       }
@@ -304,18 +283,10 @@ function ($injector, $animate) {
         var directionClass = direction == 'next' ? 'left' : 'right';
         var removeClassFn = removeClass.bind(this, element, directionClass, done);
 
-        if ($animateCss) {
-          $animateCss(element, {addClass: directionClass})
-            .start()
-            .done(removeClassFn);
-        } else {
-          $animate.addClass(element, directionClass).then(function() {
-            if (!stopped) {
-              removeClassFn();
-            }
-            done();
-          });
-        }
+        $animateCss(element, {addClass: directionClass})
+          .start()
+          .done(removeClassFn);
+
         return function() {
           stopped = true;
         };