Clarify deprecation comment to be accurate

The planned change in functionality was delayed until Juno,
the original comment was written in IceHouse. There needs to be
a period of two cycles for deprecation.

N.B: No functional change in this patch, just change of comment.

Change-Id: I3f452fbda59358fe85c1d7060a4abebd2f7c311a
Merge "Clarify deprecation comment to be accurate"