Do not write out sprout anchor/nullifier data, since we do not have any

src/coins.cpp

@@ -436,7 +436,8 @@ void CCoinsViewCache::SetBestBlock(const uint256 &hashBlockIn) {
 
 void BatchWriteNullifiers(CNullifiersMap &mapNullifiers, CNullifiersMap &cacheNullifiers)
 {
-    LogPrintf("%s\n", __FUNCTION__);
+    if(fZdebug)
+        LogPrintf("%s\n", __FUNCTION__);
     for (CNullifiersMap::iterator child_it = mapNullifiers.begin(); child_it != mapNullifiers.end();) {
         if (child_it->second.flags & CNullifiersCacheEntry::DIRTY) { // Ignore non-dirty entries (optimization).
             CNullifiersMap::iterator parent_it = cacheNullifiers.find(child_it->first);
@@ -534,10 +535,10 @@ bool CCoinsViewCache::BatchWrite(CCoinsMap &mapCoins,
         mapCoins.erase(itOld);
     }
 
-    ::BatchWriteAnchors<CAnchorsSproutMap, CAnchorsSproutMap::iterator, CAnchorsSproutCacheEntry>(mapSproutAnchors, cacheSproutAnchors, cachedCoinsUsage);
+    //::BatchWriteAnchors<CAnchorsSproutMap, CAnchorsSproutMap::iterator, CAnchorsSproutCacheEntry>(mapSproutAnchors, cacheSproutAnchors, cachedCoinsUsage);
     ::BatchWriteAnchors<CAnchorsSaplingMap, CAnchorsSaplingMap::iterator, CAnchorsSaplingCacheEntry>(mapSaplingAnchors, cacheSaplingAnchors, cachedCoinsUsage);
 
-    ::BatchWriteNullifiers(mapSproutNullifiers, cacheSproutNullifiers);
+    //::BatchWriteNullifiers(mapSproutNullifiers, cacheSproutNullifiers);
     ::BatchWriteNullifiers(mapSaplingNullifiers, cacheSaplingNullifiers);
 
     hashSproutAnchor = hashSproutAnchorIn;