repair: Remove #if'ed code in repair_ranges
repair: Remove #if'ed code in repair_ranges

It is unlikely we will use parallel_for_each version in repair_ranges.
Get rid of the dead code.

Message-Id: <28b2f9889f590ab766210d08318c0e2fd489e37c@scylladb.com>


avikivity/scylla,scylladb/scylla,scylladb/scylla,duarten/scylla,scylladb/scylla,avikivity/scylla,duarten/scylla,scylladb/scylla,duarten/scylla,avikivity/scylla