--- a/ExternalStream.st	Thu Jun 30 21:12:35 2016 +0100
+++ b/ExternalStream.st	Fri Jul 01 15:31:10 2016 +0100
@@ -2359,16 +2359,6 @@
     "Modified: / 8.5.1999 / 20:12:36 / cg"
 !
 
-errorNotOpen
-    "{ Pragma: +optSpace }"
-
-    "report an error, that the stream has not been opened"
-
-    ^ StreamNotOpenError raiseRequestWith:self  "/ in:thisContext sender
-
-    "Modified: / 8.5.1999 / 20:12:33 / cg"
-!
-
 errorReadOnly
     "{ Pragma: +optSpace }"