refactor: move DEFAULT_COINSTATSINDEX from validation to coinstatsindex

Author: fanquake

src/index/coinstatsindex.h

@@ -14,6 +14,8 @@ namespace kernel {
 struct CCoinsStats;
 }
 
+static constexpr bool DEFAULT_COINSTATSINDEX{false};
+
 /**
  * CoinStatsIndex maintains statistics on the UTXO set.
  */

src/validation.h

@@ -65,7 +65,6 @@ static const int MAX_SCRIPTCHECK_THREADS = 15;
 static const int DEFAULT_SCRIPTCHECK_THREADS = 0;
 static const int64_t DEFAULT_MAX_TIP_AGE = 24 * 60 * 60;
 static const bool DEFAULT_CHECKPOINTS_ENABLED = true;
-static constexpr bool DEFAULT_COINSTATSINDEX{false};
 static const char* const DEFAULT_BLOCKFILTERINDEX = "0";
 /** Default for -stopatheight */
 static const int DEFAULT_STOPATHEIGHT = 0;