remove last half spacing usage

assets/sass/_theme/design-system/footer.sass

@@ -119,7 +119,7 @@ footer#document-footer
                     &::after
                         font-size: $footer-icons-size
                         @include media-breakpoint-up(desktop)
-                            margin-right: half(-$spacing-2)
+                            margin-right: -0.2em
                             padding-left: $spacing-2
                     @include media-breakpoint-down(desktop)
                         width: fit-content

assets/sass/_theme/design-system/search.sass

@@ -139,7 +139,7 @@
                 @include media-breakpoint-down(desktop)
                     display: none
             + li
-                margin-top: half($spacing-5)
+                margin-top: $spacing-4
             @include media-breakpoint-up(desktop)
                 @include grid
                 &-inner

assets/sass/_theme/utils/sizes.sass

@@ -5,6 +5,3 @@ $space-unit: 4 !default
 @function pxToRem($size)
     $remSize: $size / 16
     @return #{$remSize}rem
-
-@function half($size)
-    @return calc(#{$size} / 2)
\ No newline at end of file