IOS-1673 Even less constants needed

pEpObjCAdapterFramework/PEPConstants.h

@@ -10,15 +10,6 @@
 
 #pragma mark - Constants
 
-/** Optional field "X-pEp-Version" */
-extern NSString *const _Nonnull kXpEpVersion;
-
-/** Optional field "X-EncStatus" */
-extern NSString *const _Nonnull kXEncStatus;
-
-/** Optional field "X-KeyList" */
-extern NSString *const _Nonnull kXKeylist;
-
 /** The key of the header for certain sync messages, "pEp-auto-consume". */
 extern NSString *const _Nonnull kPepHeaderAutoConsume;
 

pEpObjCAdapterFramework/PEPConstants.m

@@ -10,14 +10,6 @@
 
 #pragma mark - Constants
 
-NSString *const kXpEpVersion = @"X-pEp-Version";
-
-NSString *const kXEncStatus = @"X-EncStatus";
-
-NSString *const kXKeylist = @"X-KeyList";
-
-NSString *const _Nonnull kPepIsOwnIdentity = @"kPepIsOwnIdentity";
-
 NSString *const _Nonnull kPepHeaderAutoConsume = @"pEp-auto-consume";
 
 NSString *const _Nonnull kPepValueAutoConsumeYes = @"yes";