XWIKI-22675: Extra line below facet items (#3759) (#3762)

(cherry picked from commit 2f1ee0f2)

Co-authored-by: LucasC <lucas.charpentier@xwiki.com>

xwiki-platform-core/xwiki-platform-search/xwiki-platform-search-solr/xwiki-platform-search-solr-ui/src/main/resources/Main/SolrSearch.xml

@@ -722,19 +722,6 @@
   position: relative;
 }
 
-.search-facet-header:after {
-  border-bottom: 1px dotted $theme.pageContentBackgroundColor;
-  border-top: 1px dotted $theme.borderColor;
-  clear: both;
-  content: "";
-  display: block;
-  height: 0;
-  position: absolute;
-  right: 0;
-  bottom: 0;
-  width: 100%;
-}
-
 .search-facet:last-of-type .search-facet-header:after {
   border: medium none;
 }