[Telephony Debug Menu] Remove DcRtInfo

Remove the obsolete and unsupported DcRtInfo
field from the Debug menu. Since it doesn't
do anything and hasn't for a few releases,
we should make space for things that are
supported and minimize clutter.

Bug: 78791811
Test: manual
Change-Id: Id4cc808bf5c7671408cd5297965d93140aeefe97