clean up extra key from amplify.store <1.0.0

amplify-store-cleanup.js

// Prior to 1.0.0, amplify.store created a key to track all of the values
// that were stored. The 1.0.0 release no longer uses this key and as a
// result, if you ask for all of the values (using amplify.store()) you'll
// get back one extra value.
//
// Simply include this code after you include amplify.store and it will
// remove the extra key. You'll want to include this anywhere that you
// have previously used amplify.store.

(function() {

var types = amplify.store.types;

if ( types.localStorage ) {
	localStorage.removeItem( "__amplify__" );
}

if ( types.sessionStorage ) {
	sessionStorage.removeItem( "__amplify__" );
}

if ( types.globalStorage ) {
	globalStorage[ location.hostname ].removeItem( "__amplify__" );
}

if ( types.userData ) {
	var div = document.createElement( "div" );
	document.getElementsByTagName( "head" )[ 0 ].appendChild( div );
	div.addBehavior( "#default#userdata" );
	div.load( "amplify" );
	div.removeAttribute( "amplify" );
	div.save( "amplify" );
	div.parentNode.removeChild( div );
}

}());