logalloc: remove unused max_occupancy_for_compaction
logalloc: remove unused max_occupancy_for_compaction

Noticed by clang.

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