schema: replace outdated comment on default compaction strategy

Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com>
Message-Id: <20211104210043.199156-1-raphaelsc@scylladb.com>

schema.hh

@@ -637,8 +637,7 @@ private:
         int32_t _max_index_interval = 2048;
         int32_t _memtable_flush_period = 0;
         speculative_retry _speculative_retry = ::speculative_retry(speculative_retry::type::PERCENTILE, 0.99);
-        // FIXME: SizeTiered doesn't really work yet. Being it marked here only means that this is the strategy
-        // we will use by default - when we have the choice.
+        // This is the compaction strategy that will be used by default on tables which don't have one explicitly specified.
         sstables::compaction_strategy_type _compaction_strategy = sstables::compaction_strategy_type::size_tiered;
         std::map<sstring, sstring> _compaction_strategy_options;
         bool _compaction_enabled = true;