[ui] remove dead css

ui/src/components/Inspect.svelte

@@ -138,35 +138,6 @@
     overflow-y: auto;
   }
 
-  .hr {
-    position: relative;
-    margin: 2rem 0 1rem 0;
-
-    hr {
-      border: none;
-      border-top: 4px double var(--foreground);
-      height: 1rem;
-    }
-
-    .hr-label {
-      position: absolute;
-      top: -1ex;
-      left: 50%;
-      transform: translateX(-50%);
-
-      font-weight: bold;
-      font-size: 18px;
-
-      color: var(--foreground);
-      background: var(--background);
-      padding: 0 4px;
-
-      sl-icon {
-        margin-bottom: -4px;
-      }
-    }
-  }
-
   .error {
     color: red;
   }