remove identifier from CCMetadataNet

iOSClient/Networking/CCNetworking.h

@@ -106,7 +106,6 @@
 @property (nonatomic, strong) NSString *fileName;
 @property (nonatomic, strong) NSString *fileNameTo;
 @property (nonatomic, strong) NSString *fileNameView;
-@property (nonatomic, strong) NSString *identifier;
 @property (nonatomic, strong) NSString *key;
 @property (nonatomic, strong) NSString *keyCipher;
 @property (nonatomic, strong) id options;

iOSClient/Networking/CCNetworking.m

@@ -1534,7 +1534,6 @@
     [metadataNet setFileName: self.fileName];
     [metadataNet setFileNameTo: self.fileNameTo];
     [metadataNet setFileNameView: self.fileNameView];
-    [metadataNet setIdentifier: self.identifier];
     [metadataNet setKey: self.key];
     [metadataNet setKeyCipher: self.keyCipher];
     [metadataNet setOptions: self.options];