remove deprecated parts

assets/css/mt-preloader.css

@@ -1,56 +0,0 @@
-#preloader-background {
-	background: #fff none repeat scroll 0 0;
-	height: 100%;
-	left: 0;
-	position: fixed;
-	top: 0;
-	width: 100%;
-	z-index: 99999
-}
-
-#preloader-background .preloader-wrapper {
-	left: 50%;
-	position: absolute;
-	top: 50%;
-	-webkit-transform: translate(-50%, -50%);
-	-moz-transform: translate(-50%, -50%);
-	-ms-transform: translate(-50%, -50%);
-	-o-transform: translate(-50%, -50%);
-	transform: translate(-50%, -50%)
-}
-
-.sk-spinner-pulse {
-	width: 40px;
-	height: 40px;
-	margin: 40px auto;
-	background-color: #333;
-	border-radius: 100%;
-	-webkit-animation: sk-pulseScaleOut 1s infinite ease-in-out;
-	animation: sk-pulseScaleOut 1s infinite ease-in-out
-}
-
-@-webkit-keyframes sk-pulseScaleOut {
-	0% {
-		-webkit-transform: scale(0);
-		transform: scale(0)
-	}
-
-	100% {
-		-webkit-transform: scale(1);
-		transform: scale(1);
-		opacity: 0
-	}
-}
-
-@keyframes sk-pulseScaleOut {
-	0% {
-		-webkit-transform: scale(0);
-		transform: scale(0)
-	}
-
-	100% {
-		-webkit-transform: scale(1);
-		transform: scale(1);
-		opacity: 0
-	}
-}