Remove superfluous units specification
Remove superfluous units specification

Units are defined in the base type, there is no need to define
them in the leaf.

JIRA: BGPCEP-907
Change-Id: I285db487de6807ccfe380914b88137f360d71e75
Signed-off-by: Robert Varga <91ae5aa8c7a9f7e57b701db766e23e544aaa6ae9@pantheon.tech>

opendaylight/bgpcep