Ensure carousel works in IE10/11

- Drops the `if-supports-3d-transforms()` mixin since all our browsers do support it

- Updates carousel to not rely on that mixin

scss/_carousel.scss

@@ -13,12 +13,9 @@
   position: relative;
   display: none;
   width: 100%;
-
-  @include if-supports-3d-transforms() {
-    @include transition($carousel-transition);
-    backface-visibility: hidden;
-    perspective: 1000px;
-  }
+  @include transition($carousel-transition);
+  backface-visibility: hidden;
+  perspective: 1000px;
 }
 
 .carousel-item.active,
@@ -34,21 +31,19 @@
 }
 
 // CSS3 transforms when supported by the browser
-@include if-supports-3d-transforms() {
-  .carousel-item-next.carousel-item-left,
-  .carousel-item-prev.carousel-item-right {
-    transform: translate3d(0, 0, 0);
-  }
+.carousel-item-next.carousel-item-left,
+.carousel-item-prev.carousel-item-right {
+  transform: translate3d(0, 0, 0);
+}
 
-  .carousel-item-next,
-  .active.carousel-item-right {
-    transform: translate3d(100%, 0, 0);
-  }
+.carousel-item-next,
+.active.carousel-item-right {
+  transform: translate3d(100%, 0, 0);
+}
 
-  .carousel-item-prev,
-  .active.carousel-item-left {
-    transform: translate3d(-100%, 0, 0);
-  }
+.carousel-item-prev,
+.active.carousel-item-left {
+  transform: translate3d(-100%, 0, 0);
 }
 
 

scss/_mixins.scss

@@ -14,7 +14,6 @@
 @import "mixins/text-emphasis";
 @import "mixins/text-hide";
 @import "mixins/text-truncate";
-@import "mixins/transforms";
 @import "mixins/visibility";
 
 // // Components

scss/mixins/_transforms.scss

-// Applies the given styles only when the browser support CSS3 3D transforms.
-@mixin if-supports-3d-transforms() {
-  @media (-webkit-transform-3d) {
-    // Old Safari, Old Android
-    // http://caniuse.com/#feat=css-featurequeries
-    // https://developer.mozilla.org/en-US/docs/Web/CSS/@media/-webkit-transform-3d
-    @content;
-  }
-
-  @supports (transform: translate3d(0,0,0)) {
-    // The Proper Way: Using a CSS feature query
-    @content;
-  }
-}