Remove copyResume method.

lib/mbtiles.js

@@ -656,18 +656,3 @@ MBTiles.prototype.putInfo = function(data, callback) {
     });
 };
 
-// Copy resume. Optionally retrieve the highest inserted key for resuming a
-// tilelive.copy operation.
-MBTiles.prototype.copyResume = function(callback) {
-    if (typeof callback !== 'function') throw new Error('Callback needed');
-    if (!this.open) return callback(new Error('MBTiles not yet loaded'));
-    var mbtiles = this;
-    // y is ASC here because tilelive.copy uses XYZ when writing/ordering
-    // tiles but y is "flipped" to TMS when stored in an MBTiles database.
-    this._db.get('SELECT zoom_level AS z, tile_column AS x, tile_row AS y FROM tiles ORDER BY z DESC, y ASC, x DESC LIMIT 1', function(err, row) {
-        if (err) return callback(err);
-        if (row) row.y = (1 << row.z) - 1 - row.y; // TMS => XYZ
-        return callback(null, row);
-    });
-};
-