remove unnecessary style

src/client/styles/scss/_linkedit-preview.scss

@@ -1,15 +1,8 @@
 .linkedit-preview {
   // same height as forms
   height: 327.5px;
-  @include media-breakpoint-up(lg) {
-    position: relative;
-    height: 100%;
-  }
 
   .page-editor-preview-body {
-    @include media-breakpoint-up(lg) {
-      position: absolute;
-    }
     height: 100%;
   }
 }