diff --git a/repository/Grease-Pharo90-Core.package/SequenceableCollection.extension/instance/sorted.st b/repository/Grease-Pharo90-Core.package/SequenceableCollection.extension/instance/sorted.st
deleted file mode 100644
index 0836e77c..00000000
--- a/repository/Grease-Pharo90-Core.package/SequenceableCollection.extension/instance/sorted.st
+++ /dev/null
@@ -1,3 +0,0 @@
-*Grease-Pharo90-Core
-sorted
-	^ self sorted: [ :a :b | a <= b ]
\ No newline at end of file