Remove deprecated BUYCollection properties.

Mobile Buy SDK/Mobile Buy SDK/Models/Persistent/BUYCollection.h

@@ -29,12 +29,6 @@
 
 @interface BUYCollection : _BUYCollection {}
 
-@property (nonatomic, readonly) NSDate *createdAtDate NS_DEPRECATED_IOS(8_0, 9_0);
-@property (nonatomic, readonly) NSDate *updatedAtDate NS_DEPRECATED_IOS(8_0, 9_0);
-@property (nonatomic, readonly) NSDate *publishedAtDate NS_DEPRECATED_IOS(8_0, 9_0);
-
-@property (nonatomic, readonly) NSURL *imageURL NS_DEPRECATED_IOS(8_0, 9_0);
-
 @property (nonatomic, readonly) NSString *stringDescription;
 
 /**

Mobile Buy SDK/Mobile Buy SDK/Models/Persistent/BUYCollection.m

@@ -29,27 +29,6 @@
 #import "NSString+BUYAdditions.h"
 
 @implementation BUYCollection
-@synthesize stringDescription=_stringDescription;
-
-- (NSDate *)createdAtDate
-{
-	return self.createdAt;
-}
-
-- (NSDate *)updatedAtDate
-{
-	return self.updatedAt;
-}
-
-- (NSDate *)publishedAtDate
-{
-	return self.publishedAt;
-}
-
-- (NSURL *)imageURL
-{
-	return self.image.sourceURL;
-}
 
 - (void)updateStringDescription
 {