service/migration_manager: Cleanup has_compatible_schema_tables_version()
service/migration_manager: Cleanup has_compatible_schema_tables_version()

Signed-off-by: Duarte Nunes <a60e8b7496f7715d71354fe4c06dd24017025bf1@scylladb.com>

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