diff --git a/comfy_execution/validation.py b/comfy_execution/validation.py
index 3cca01df7..24c0b4ed7 100644
--- a/comfy_execution/validation.py
+++ b/comfy_execution/validation.py
@@ -29,13 +29,6 @@ def validate_node_input(
     if received_type == IO.MatchType.io_type or input_type == IO.MatchType.io_type:
         return True
 
-    # If input_type is a Combo, frontend permits a Combo output to be connected,
-    # but it is defined as a tuple of values with V3 schema.
-    # This probably should be dealt with sending one thing to the frontend and another to the backend,
-    # but this will do for now.
-    if input_type == "COMBO" and isinstance(received_type, tuple):
-        return True
-
     # Not equal, and not strings
     if not isinstance(received_type, str) or not isinstance(input_type, str):
         return False