code: function removeItem$2(key, callback) {
      var self = this;
  
      key = normalizeKey(key);
  
      var promise = self.ready().then(function () {
          var dbInfo = self._dbInfo;
          localStorage.removeItem(dbInfo.keyPrefix + key);
      });
  
      executeCallback(promise, callback);
      return promise;
  }
docs: Remove an item from the store, nice and simple.