Remove redundnant Hr definition since we have it already in DOM API

examples/web_landing/src/jsMain/kotlin/com/sample/content/IntroSection.kt

@@ -221,15 +221,4 @@ private fun ComposeWebStatusMessage() {
             }
         }
     }
-}
-
-@Composable
-fun Hr(
-    attrs: (AttrsBuilder<Tag.Div>.() -> Unit) = {}
-) {
-    TagElement<Tag.Div, HTMLElement>(
-        tagName = "hr",
-        applyAttrs = attrs,
-        content = { }
-    )
 }