saumur: fix broken cell borders without image (#72007)

static/saumur/_custom.scss

@@ -158,9 +158,6 @@ div.link-cell {
 }
 
 %orange-border {
-    content: " ";
-    display: block;
-    margin: $space-small auto;
     border-bottom: 3px solid $orange;
 }
 
@@ -172,9 +169,7 @@ div.link-cell {
     div#services > ul > li > strong > a,
     div.textcell h2:first-child,
     div.cell:not(.has-asset-picture) h2:first-child {
-        &::after {
-            @extend %orange-border
-        }
+        @extend %orange-border;
     }
 }
 
@@ -185,6 +180,7 @@ div.link-cell {
     h2:first-child {
         padding-left: $space-large;
         width: 100%;
+        @extend %orange-border;
     }
     img {
         position: absolute;
@@ -193,14 +189,6 @@ div.link-cell {
         top: $space-small;
         left: 0;
     }
-    &.foldable:not(.folded) picture::after {
-        @extend %orange-border;
-        margin: 0;
-    }
-    &:not(.foldable) picture::after {
-        @extend %orange-border;
-        margin: 0;
-    }
 }