fixup attach-ns documentation

Signed-off-by: Keith Busch <[email protected]>

Author: keithbusch

Documentation/nvme-attach-ns.txt

@@ -33,9 +33,6 @@ EXAMPLES
 	Attach namspace to the controller:
 
 		# nvme attach-ns /dev/nvme1  -n 0x2 -c 0x21
-        
-		Note: Namespace identifier and controller identifier(s) should be in hexadecimal.
-
 
 NVME
 ----