Really fix duplicate border around search results (#31305)

app/javascript/styles/mastodon/components.scss

@@ -3086,11 +3086,6 @@ $ui-header-logo-wordmark-width: 99px;
   .explore__search-header {
     display: flex;
   }
-
-  .explore__search-results {
-    border: 0;
-    border-radius: 0;
-  }
 }
 
 .icon-with-badge {
@@ -8789,11 +8784,14 @@ noscript {
   flex: 1 1 auto;
   display: flex;
   flex-direction: column;
+
+  @media screen and (min-width: $no-gap-breakpoint) {
     border: 1px solid var(--background-border-color);
     border-top: 0;
     border-bottom-left-radius: 4px;
     border-bottom-right-radius: 4px;
   }
+}
 
 .story {
   display: flex;