code: function removeItem(key, callback) {
  	        var self = this;
  
  	        // Cast the key to a string, as that's all we can set as a key.
  	        if (typeof key !== 'string') {
  	            globalObject.console.warn(key + ' used as a key, but it is not a string.');
  	            key = String(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.