diff --git a/enzevalos_iphone.xcodeproj/project.pbxproj b/enzevalos_iphone.xcodeproj/project.pbxproj
index fca805fdf63edbb8af9abde7028b1ba142a80dba..7a7ddd05e35060a9738ab25f1c828f735f656f34 100644
--- a/enzevalos_iphone.xcodeproj/project.pbxproj
+++ b/enzevalos_iphone.xcodeproj/project.pbxproj
@@ -67,7 +67,6 @@
 		472F398C1E2519C8009260FB /* CNContactExtension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 472F398B1E2519C8009260FB /* CNContactExtension.swift */; };
 		472F398E1E251B8D009260FB /* MailAddress.swift in Sources */ = {isa = PBXBuildFile; fileRef = 472F398D1E251B8D009260FB /* MailAddress.swift */; };
 		472F39901E252470009260FB /* CNMailAddressesExtension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 472F398F1E252470009260FB /* CNMailAddressesExtension.swift */; };
-		4733B1CE25262CDB00AB5600 /* PersistentDataProtocol.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4733B1CD25262CDB00AB5600 /* PersistentDataProtocol.swift */; };
 		4733B1E52527196100AB5600 /* PersistentDataProvider.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4733B1E42527196100AB5600 /* PersistentDataProvider.swift */; };
 		4733B202252B142C00AB5600 /* Properties.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4733B201252B142B00AB5600 /* Properties.swift */; };
 		4733B206252B16D100AB5600 /* FolderRecord.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4733B205252B16D100AB5600 /* FolderRecord.swift */; };
@@ -414,7 +413,6 @@
 		472F398B1E2519C8009260FB /* CNContactExtension.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CNContactExtension.swift; sourceTree = "<group>"; };
 		472F398D1E251B8D009260FB /* MailAddress.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = MailAddress.swift; sourceTree = "<group>"; };
 		472F398F1E252470009260FB /* CNMailAddressesExtension.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CNMailAddressesExtension.swift; sourceTree = "<group>"; };
-		4733B1CD25262CDB00AB5600 /* PersistentDataProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PersistentDataProtocol.swift; sourceTree = "<group>"; };
 		4733B1E42527196100AB5600 /* PersistentDataProvider.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PersistentDataProvider.swift; sourceTree = "<group>"; };
 		4733B201252B142B00AB5600 /* Properties.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Properties.swift; sourceTree = "<group>"; };
 		4733B205252B16D100AB5600 /* FolderRecord.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FolderRecord.swift; sourceTree = "<group>"; };
@@ -1392,7 +1390,6 @@
 				47FAE3112524BFDB005A1BCB /* PersistentDataError.swift */,
 				47FAE31B2524C07B005A1BCB /* MailRecord.swift */,
 				47FAE3482524FB58005A1BCB /* AddressRecord.swift */,
-				4733B1CD25262CDB00AB5600 /* PersistentDataProtocol.swift */,
 				4733B1E42527196100AB5600 /* PersistentDataProvider.swift */,
 				4733B201252B142B00AB5600 /* Properties.swift */,
 				4733B205252B16D100AB5600 /* FolderRecord.swift */,
@@ -2341,7 +2338,6 @@
 				0EF148082422572500B3C198 /* general-helpers.c in Sources */,
 				F113C3851F30D06800E7F1D6 /* QRScannerView.swift in Sources */,
 				97BDE0432429188500B0BF03 /* BadgeProgressView.swift in Sources */,
-				4733B1CE25262CDB00AB5600 /* PersistentDataProtocol.swift in Sources */,
 				47C822682438A85C005BCE73 /* SenderDetails.swift in Sources */,
 				477670C6228454F700043604 /* ButtonCell.swift in Sources */,
 				47C8225824379EAE005BCE73 /* FloatingActionButton.swift in Sources */,
diff --git a/enzevalos_iphone/persistentData/PersistentDataProtocol.swift b/enzevalos_iphone/persistentData/PersistentDataProtocol.swift
deleted file mode 100644
index a1592b2e68fc90a0b91ff713db53d4b64b031ce9..0000000000000000000000000000000000000000
--- a/enzevalos_iphone/persistentData/PersistentDataProtocol.swift
+++ /dev/null
@@ -1,11 +0,0 @@
-//
-//  PersistentDataProtocol.swift
-//  enzevalos_iphone
-//
-//  Created by Oliver Wiese on 01.10.20.
-//  Copyright © 2020 fu-berlin. All rights reserved.
-//
-
-
-
-