fix (line-clamp): remove color property

Author: firestar300

src/scss/02-tools/_m-line-clamp.scss

@@ -6,7 +6,6 @@
 @mixin line-clamp($lines: 2) {
     display: -webkit-box;
     overflow: hidden;
-    color: $color-light;
     -webkit-line-clamp: #{$lines};
     -webkit-box-orient: vertical;
 }