Browser+WebContent+WebDriver: Move Get Page Source to WebContent

Author: https://github.com/trflynn89
Commit: 88dcdf681f
Pull-request: https://github.com/SerenityOS/serenity/pull/16019
Reviewed-by: https://github.com/linusg ✅

Userland/Services/WebContent/WebContentServer.ipc

@@ -35,7 +35,6 @@ endpoint WebContentServer
 
     debug_request(String request, String argument) =|
     get_source() =|
-    serialize_source() => (String source)
     inspect_dom_tree() =|
     inspect_dom_node(i32 node_id, Optional<Web::CSS::Selector::PseudoElement> pseudo_element) => (bool has_style, String specified_style, String computed_style, String custom_properties, String node_box_sizing)
     get_hovered_node_id() => (i32 node_id)