E3-3 Remove the trustwords method that can't be supported anymore

Subprojects/PEPObjCAdapterProtocols/PublicHeaders/PEPSessionProtocol.h

@@ -130,13 +130,6 @@ extern NSString *const _Nonnull PEPObjCAdapterErrorDomain;
                  errorCallback:(void (^)(NSError *error))errorCallback
                successCallback:(void (^)(NSString *trustwords))successCallback;
 
-- (void)getTrustwordsFpr1:(NSString *)fpr1
-                     fpr2:(NSString *)fpr2
-                 language:(NSString *_Nullable)language
-                     full:(BOOL)full
-            errorCallback:(void (^)(NSError *error))errorCallback
-          successCallback:(void (^)(NSString *trustwords))successCallback;
-
 - (void)languageList:(void (^)(NSError *error))errorCallback
      successCallback:(void (^)(NSArray<PEPLanguage *> *languages))successCallback;
 

src/PEPInternalSession.h

@@ -195,13 +195,6 @@ NS_ASSUME_NONNULL_BEGIN
                                           full:(BOOL)full
                                          error:(NSError * _Nullable * _Nullable)error;
 
-/** Determine trustwords for two fprs */
-- (NSString * _Nullable)getTrustwordsFpr1:(NSString *)fpr1
-                                     fpr2:(NSString *)fpr2
-                                 language:(NSString * _Nullable)language
-                                     full:(BOOL)full
-                                    error:(NSError * _Nullable * _Nullable)error;
-
 /**
  @returns The list of supported languages for trustwords.
  */

src/PEPInternalSession.m

@@ -663,34 +663,6 @@ void decryptMessageFree(message *src, message *dst, stringlist_t *extraKeys)
     return result;
 }
 
-- (NSString * _Nullable)getTrustwordsFpr1:(NSString * _Nonnull)fpr1
-                                     fpr2:(NSString * _Nonnull)fpr2
-                                 language:(NSString * _Nullable)language
-                                     full:(BOOL)full
-                                    error:(NSError * _Nullable * _Nullable)error
-{
-    const char *_fpr1 = [fpr1 UTF8String]; // fprs are NFC normalized anyway
-    const char *_fpr2 = [fpr2 UTF8String];
-    
-    PEPAutoPointer *trustwords = [PEPAutoPointer new];
-    __block size_t sizeWritten = 0;
-
-    PEPStatus status = (PEPStatus) [self runWithPasswords:^PEP_STATUS(PEP_SESSION session) {
-        return get_xor_trustwords_for_fprs(session, _fpr1, _fpr2,
-                                           [[language precomposedStringWithCanonicalMapping]
-                                            UTF8String],
-                                           trustwords.charPointerPointer, &sizeWritten, full);
-    }];
-    
-    NSString *result = nil;
-    
-    if (![PEPStatusNSErrorUtil setError:error fromPEPStatus:status]) {
-        result = [NSString stringWithUTF8String:trustwords.charPointer];
-    }
-    
-    return result;
-}
-
 - (NSArray<PEPLanguage *> * _Nullable)languageListWithError:(NSError * _Nullable * _Nullable)error
 {
     PEPAutoPointer *chLangs = [PEPAutoPointer new];

src/PEPSession.m

@@ -411,28 +411,6 @@ successCallback:(void (^)(NSString *log))successCallback
     });
 }
 
-- (void)getTrustwordsFpr1:(NSString *)fpr1
-                     fpr2:(NSString *)fpr2
-                 language:(NSString * _Nullable)language
-                     full:(BOOL)full
-            errorCallback:(void (^)(NSError *error))errorCallback
-          successCallback:(void (^)(NSString *trustwords))successCallback
-{
-    dispatch_async(queue, ^{
-        NSError *error = nil;
-        NSString *trustwords = [[PEPSessionProvider session] getTrustwordsFpr1:fpr1
-                                                                          fpr2:fpr2
-                                                                      language:language
-                                                                          full:full
-                                                                         error:&error];
-        if (trustwords) {
-            successCallback(trustwords);
-        } else {
-            errorCallback(error);
-        }
-    });
-}
-
 - (void)languageList:(void (^)(NSError *error))errorCallback
      successCallback:(void (^)(NSArray<PEPLanguage *> *languages))successCallback