Revert "[Feature] Adding Step Endpoint Information (project-chip#35662)"

This reverts commit 36fff94.

This breaks the TH and the API for the step command is overkill.

scripts/py_matter_yamltests/matter_yamltests/hooks.py

@@ -152,16 +152,14 @@ def step_skipped(self, name: str, expression: str):
         """
         pass
 
-    def step_start(self, request: TestStep, endpoint: Optional[int] = None):
+    def step_start(self, request: TestStep):
         """
         This method is called when the runner starts running a step from the test.
 
         Parameters
         ----------
         request: TestStep
             The original request as defined by the test step.
-        endpoint: int
-            An optional device endpoint the step will target.
         """
         pass