chore: remove style class from mixins

src/scss/_drawing.scss

@@ -18,6 +18,12 @@
   justify-content: space-between;
 }
 
+.bg {
+    @each $name, $color in list-colors() {
+        &-#{$name} { @include background-color(get-color($name)); }
+    }
+}
+
 strong.btn-fake {
   @include button($button_large);
   @include button-fullcontrol(transparent, transparent, rgba(0,0,0,1));

src/scss/_typography.scss

@@ -74,6 +74,13 @@ ul, ol {
   }
 }
 
+::selection {
+  @include background-color($color-selection);
+}
+::-moz-selection {
+  @include background-color($color-selection);
+}
+
 /* 2.2 - Text Wrapper */
 
 .container-article, .container-typographic {

src/scss/mixins/_colors.css

@@ -59,31 +59,3 @@
   background-color: $background-color;
   color: getTextColorFromBackground($background-color);
  }
-
- // Colorize important elements
- // Direct uses of colors
-
- a, a:hover, a:active {
-   color: $color-link;
- }
-
- ::selection {
-   @include background-color($color-selection);
- }
- ::-moz-selection {
-   @include background-color($color-selection);
- }
-
- mark {
-   background-color: lighten($color-mark, 30%)
- }
-
- blockquote, pre {
-   border-color: $color-primary;
- }
-
- .bg {
-     @each $name, $color in list-colors() {
-         &-#{$name} { @include background-color(get-color($name)); }
-     }
- }