Swift - NSDate - remove part of date

I have a date in following format 2015-02-22T20:58:16+0000

In order to convert it to NSDate I found following solution

var df = NSDateFormatter()
df.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZZZZ"
var date = df.dateFromString(myDate)
df.dateFormat = "eee MMM dd yyyy"
var dateStr = df.stringFromDate(date!)

But I want to remove +0000 from date. I tried to remove ZZZZm but app crashes.

How can I remove extra +0000 digits ?