Remove unused method from NetApp iscsi driver

This removes _get_qos_type() from the NetApp iscsi code
as it is never used.

Change-Id: I903245b5c018bce80bdc0b8edf9ab7241e475fa4
Merge "Remove unused method from NetApp iscsi driver"
(Test commit) Change README to reflect Jio's fork of Cinder

Change-Id: I3f26c0a736e63725aec24ca2fa12c707b8e6460f