diff --git a/tests/zfs-tests/include/libtest.shlib b/tests/zfs-tests/include/libtest.shlib
index 22b79b15a..da80407a9 100644
--- a/tests/zfs-tests/include/libtest.shlib
+++ b/tests/zfs-tests/include/libtest.shlib
@@ -23,10 +23,8 @@
 #
 # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 # Use is subject to license terms.
-#
-
-#
 # Copyright (c) 2012, 2015 by Delphix. All rights reserved.
+# Copyright 2016 Nexenta Systems, Inc.
 #
 
 . ${STF_TOOLS}/include/logapi.shlib
@@ -2726,21 +2724,6 @@ function get_rootpool
 	fi
 }
 
-#
-# Get the sub string from specified source string
-#
-# $1 source string
-# $2 start position. Count from 1
-# $3 offset
-#
-function get_substr #src_str pos offset
-{
-	typeset pos offset
-
-	$ECHO $1 | \
-		$NAWK -v pos=$2 -v offset=$3 '{print substr($0, pos, offset)}'
-}
-
 #
 # Check if the given device is physical device
 #