diff --git a/spacy/errors.py b/spacy/errors.py
index 59da84890..9d9a716d2 100644
--- a/spacy/errors.py
+++ b/spacy/errors.py
@@ -456,8 +456,6 @@ class Errors:
             "issue tracker: http://github.com/explosion/spaCy/issues")
 
     # TODO: fix numbering after merging develop into master
-    E900 = ("Patterns for component '{name}' not initialized. This can be fixed "
-            "by calling 'add_patterns' or 'initialize'.")
     E902 = ("The sentence-per-line IOB/IOB2 file is not formatted correctly. "
             "Try checking whitespace and delimiters. See "
             "https://nightly.spacy.io/api/cli#convert")