diff --git a/spacy/errors.py b/spacy/errors.py
index 0d4b08af1..2b67aa87b 100644
--- a/spacy/errors.py
+++ b/spacy/errors.py
@@ -941,7 +941,6 @@ class Errors(metaclass=ErrorsWithCodes):
              "`{arg2}`={arg2_values} but these arguments are conflicting.")
     E1043 = ("Expected None or a value in range [{range_start}, {range_end}] for entity linker threshold, but got "
              "{value}.")
-    E1400 = ("save_activations attribute must be set to List[str] or bool")
 
 
 # Deprecated model shortcuts, only used in errors and warnings