LibWeb: Implement HTMLTableSectionElement::deleteRow()

Author: https://github.com/IdanHo
Commit: cc2e08d9e9
Pull-request: https://github.com/SerenityOS/serenity/pull/13014
Reviewed-by: https://github.com/awesomekling ✅

Userland/Libraries/LibWeb/HTML/HTMLTableSectionElement.idl

@@ -11,5 +11,6 @@ interface HTMLTableSectionElement : HTMLElement {
 
     [SameObject] readonly attribute HTMLCollection rows;
     HTMLTableRowElement insertRow(optional long index = -1);
+    undefined deleteRow(long index);
 
 };