chain: remove chain.byTime.

lib/blockchain/chain.js

@@ -1621,44 +1621,6 @@ Chain.prototype.seen = function seen(hash) {
   return this.db.hasCache(hash);
 };
 
-/**
- * Find a block entry by timestamp.
- * @param {Number} ts - Timestamp.
- * @returns {Promise} - Returns {@link ChainEntry}.
- */
-
-Chain.prototype.byTime = co(function* byTime(ts) {
-  var start = 0;
-  var end = this.height;
-  var pos, delta, entry;
-
-  if (ts >= this.tip.ts)
-    return this.tip;
-
-  // Do a binary search for a block
-  // mined within an hour of the
-  // timestamp.
-  while (start < end) {
-    pos = (start + end) >>> 1;
-    entry = yield this.db.getEntry(pos);
-
-    if (!entry)
-      return;
-
-    delta = Math.abs(ts - entry.ts);
-
-    if (delta <= 60 * 60)
-      break;
-
-    if (ts < entry.ts)
-      end = pos - 1;
-    else
-      start = pos + 1;
-  }
-
-  return entry;
-});
-
 /**
  * Test the chain to see if it contains a block.
  * @param {Hash} hash