Remove manual vendor prefixes

src/buttons/css/buttons-core.css

@@ -8,12 +8,7 @@
     text-align: center;
     cursor: pointer;
     -webkit-user-drag: none;
-    -webkit-user-select: none;
-    -moz-user-select: none;
-    -ms-user-select: none;
     user-select: none;
-    -webkit-box-sizing: border-box;
-    -moz-box-sizing: border-box;
     box-sizing: border-box;
 }
 

src/buttons/css/buttons.css

@@ -19,10 +19,6 @@
     /* csslint ignore:start */
     filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#00000000', endColorstr='#1a000000',GradientType=0);
     /* csslint ignore:end */
-    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(transparent), color-stop(40%, rgba(0,0,0, 0.05)), to(rgba(0,0,0, 0.10)));
-    background-image: -webkit-linear-gradient(transparent, rgba(0,0,0, 0.05) 40%, rgba(0,0,0, 0.10));
-    background-image: -moz-linear-gradient(top, rgba(0,0,0, 0.05) 0%, rgba(0,0,0, 0.10));
-    background-image: -o-linear-gradient(transparent, rgba(0,0,0, 0.05) 40%, rgba(0,0,0, 0.10));
     background-image: linear-gradient(transparent, rgba(0,0,0, 0.05) 40%, rgba(0,0,0, 0.10));
 }
 .pure-button:focus {

src/forms/css/forms.css

@@ -28,8 +28,6 @@ so we can ignore the csslint warning.
     box-shadow: inset 0 1px 3px #ddd;
     border-radius: 4px;
     vertical-align: middle;
-    -webkit-box-sizing: border-box;
-    -moz-box-sizing: border-box;
     box-sizing: border-box;
 }
 
@@ -43,8 +41,6 @@ since IE8 won't execute CSS that contains a CSS3 selector.
     border: 1px solid #ccc;
     box-shadow: inset 0 1px 3px #ddd;
     border-radius: 4px;
-    -webkit-box-sizing: border-box;
-    -moz-box-sizing: border-box;
     box-sizing: border-box;
 }
 

src/grids/css/grids-core.css

@@ -24,23 +24,11 @@
     */
     font-family: FreeSans, Arimo, "Droid Sans", Helvetica, Arial, sans-serif;
 
-    /*
+    /* Use flexbox when possible to avoid `letter-spacing` side-effects. */
-    Use flexbox when possible to avoid `letter-spacing` side-effects.
+    display: flex;
-
+    flex-flow: row wrap;
-    NOTE: Firefox (as of 25) does not currently support flex-wrap, so the
-    `-moz-` prefix version is omitted.
-    */
-
-    display: -webkit-flex;
-    -webkit-flex-flow: row wrap;
-
-    /* IE10 uses display: flexbox */
-    display: -ms-flexbox;
-    -ms-flex-flow: row wrap;
 
     /* Prevents distributing space between rows */
-    -ms-align-content: flex-start;
-	-webkit-align-content: flex-start;
     align-content: flex-start;
 }
 

src/menus/css/menus-core.css

@@ -1,7 +1,5 @@
 /*csslint adjoining-classes: false, box-model:false*/
 .pure-menu {
-    -webkit-box-sizing: border-box;
-    -moz-box-sizing: border-box;
     box-sizing: border-box;
 }