remove a bunch of needless css prefixes

app/assets/javascripts/discourse/views/post-menu.js.es6

@@ -19,7 +19,7 @@ function animateHeart($elem, start, end, complete) {
        .animate({ textIndent: end }, {
           complete: complete,
           step: function(now) {
-            $(this).css('-webkit-transform','scale('+now+')');
+            $(this).css('transform','scale('+now+')');
           },
           duration: 150
         }, 'linear');

app/assets/stylesheets/common/base/discourse.scss

@@ -182,15 +182,6 @@ body {
 }
 
 
-@-webkit-keyframes rotate-forever {
-  0% {
-    -webkit-transform: rotate(0deg);
-  }
-  100% {
-    -webkit-transform: rotate(360deg);
-  }
-}
-
 @keyframes rotate-forever {
   0% {
     transform: rotate(0deg);

app/assets/stylesheets/common/base/magnific-popup.scss

@@ -599,15 +599,12 @@ button {
 // Scale navigation arrows and reduce padding from sides
 @media all and (max-width: 900px) {
   .mfp-arrow {
-    -webkit-transform: scale(0.75);
     transform: scale(0.75);
   }
   .mfp-arrow-left {
-    -webkit-transform-origin: 0;
     transform-origin: 0;
   }
   .mfp-arrow-right {
-    -webkit-transform-origin: 100%;
     transform-origin: 100%;
   }
   .mfp-container {

app/assets/stylesheets/common/base/modal.scss

@@ -34,9 +34,6 @@
 
 //fade in
 
-@-webkit-keyframes fade {
-    from {opacity: 0}
-    to {opacity: .8}
 }@keyframes fade {
     from {opacity: 0}
     to {opacity: .8}

app/assets/stylesheets/desktop/modal.scss

@@ -31,9 +31,6 @@ animation: modal .25s;
 
 //fade in and animate up
 
-@-webkit-keyframes modal {
-    from {opacity: 0}
-    to {opacity: 1}
 }@keyframes fade {
     from {opacity: 0}
     to {opacity: 1}

app/assets/stylesheets/desktop/topic-post.scss

@@ -514,10 +514,6 @@ video {
     from {opacity: 0;}
     to {opacity: 1;}
 }
-@-webkit-keyframes fadein {
-    from {opacity: 0;}
-    to {opacity: 1;}
-}
 
 .extra-info-wrapper {
   overflow: hidden;

app/assets/stylesheets/vendor/font_awesome/_mixins.scss

@@ -2,19 +2,9 @@
 // --------------------------
 
 @mixin fa-icon-rotate($degrees, $rotation) {
-  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=$rotation);
-  -webkit-transform: rotate($degrees);
-     -moz-transform: rotate($degrees);
-      -ms-transform: rotate($degrees);
-       -o-transform: rotate($degrees);
           transform: rotate($degrees);
 }
 
 @mixin fa-icon-flip($horiz, $vert, $rotation) {
-  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=$rotation);
-  -webkit-transform: scale($horiz, $vert);
-     -moz-transform: scale($horiz, $vert);
-      -ms-transform: scale($horiz, $vert);
-       -o-transform: scale($horiz, $vert);
           transform: scale($horiz, $vert);
 }

app/assets/stylesheets/vendor/font_awesome/_spinning.scss

@@ -2,28 +2,9 @@
 // --------------------------
 
 .#{$fa-css-prefix}-spin {
-  -webkit-animation: spin 2s infinite linear;
-  -moz-animation: spin 2s infinite linear;
-  -o-animation: spin 2s infinite linear;
   animation: spin 2s infinite linear;
 }
 
-@-moz-keyframes spin {
-  0% { -moz-transform: rotate(0deg); }
-  100% { -moz-transform: rotate(359deg); }
-}
-@-webkit-keyframes spin {
-  0% { -webkit-transform: rotate(0deg); }
-  100% { -webkit-transform: rotate(359deg); }
-}
-@-o-keyframes spin {
-  0% { -o-transform: rotate(0deg); }
-  100% { -o-transform: rotate(359deg); }
-}
-@-ms-keyframes spin {
-  0% { -ms-transform: rotate(0deg); }
-  100% { -ms-transform: rotate(359deg); }
-}
 @keyframes spin {
   0% { transform: rotate(0deg); }
   100% { transform: rotate(359deg); }