remove add_preload_script

tools/wptrunner/wptrunner/executors/executorwebdriver.py

@@ -153,13 +153,6 @@ async def async_call_function(self, script, context, args=None):
                 "context": context if context else self.current_window},
             await_promise=True)
 
-    async def add_preload_script(self, script, contexts=None, arguments=None, sandbox=None):
-        return await self.webdriver.bidi_session.script.add_preload_script(
-            function_declaration=script,
-            contexts=contexts,
-            arguments=arguments,
-            sandbox=sandbox)
-
 
 class WebDriverTestharnessProtocolPart(TestharnessProtocolPart):
     def setup(self):

tools/wptrunner/wptrunner/executors/protocol.py

@@ -371,18 +371,6 @@ async def async_call_function(self, script, context, args=None):
         """
         pass
 
-    @abstractmethod
-    async def add_preload_script(self, script, contexts=None, arguments=None, sandbox=None):
-        """
-        Adds preload script to the given context or globally.
-
-        :param str script: The js source to execute.
-        :param list contexts: The context in which to execute the script.
-        :param list arguments: List of channels to pass to the script.
-        :param str sandbox: The sandbox in which to execute the script.
-        """
-        pass
-
 
 class CookiesProtocolPart(ProtocolPart):
     """Protocol part for managing cookies"""