Fan tach sensor thresholds for swift/wspoon removed

Hard-coded values for fan tach sensor thresholds don't work because
these values vary. For accurate reporting, Redfish sensor output looks
at the functional status on the fan inventory.

Tested:
Same config files changed under /etc and change verified in the webUI

Signed-off-by: Aatir Manzur <aatrapps@gmail.com>
Change-Id: Icef9d8250572b8da2b71f15e64411e891990eb12
4 files changed