Remove unused boundary enums

The symbols for the first and last values in the NYX_DEVICE_*,
NYX_DEVICE_INFO_* and NYX_OS_INFO_* enumerations were meant to
enable clients to iterate over the range of legal values. Instead
they simply caused an ABI break everytime a new value was added,
and were never used.

Therefore, they have been removed.

[GF-2451] Remove all iterator boundary values from ENUM's in API

Open-webOS-DCO-1.0-Signed-off-by: Keith Derrick <keith.derrick@lge.com>

Change-Id: I69d3cfc4fcf4a30d24e1f5c6a8093bb1f35f3f66