Remove -webkit-backface-visibility on skew mixin

Ref #5319 - This rule is causing pixelated edges on iOS. Removing
it makes everything smooth across all OS's, browsers, and devices.

diff --git a/less/mixins.less b/less/mixins.less
index 67e2ed689a8d7af4c597283c9517296a4004c0b9..740e4c1367c6af8fc18293f0e9cc0b9ee0fe475c 100644 (file)
--- a/less/mixins.less
+++ b/less/mixins.less
@@ -212,7 +212,6 @@
       -ms-transform: skewX(@x) skewY(@y); // See https://github.com/twitter/bootstrap/issues/4885
        -o-transform: skew(@x, @y);
           transform: skew(@x, @y);
-  -webkit-backface-visibility: hidden; // See https://github.com/twitter/bootstrap/issues/5319
 }
 .translate3d(@x, @y, @z) {
   -webkit-transform: translate3d(@x, @y, @z);