TF-4274 Persist encryption key hive avoid broken data

lib/features/caching/caching_manager.dart

@@ -104,7 +104,6 @@ class CachingManager {
         _oidcConfigurationCacheManager.clear(),
         _tokenOidcCacheManager.clear(),
         _authenticationInfoCacheManager.clear(),
-        _encryptionKeyCacheManager.clear(),
       ], eagerError: true);
     } catch (e) {
       logWarning('CachingManager::clearAccountDataCached: Cannot clear account data cache: $e');

lib/features/login/data/local/encryption_key_cache_manager.dart

@@ -18,11 +18,6 @@ class EncryptionKeyCacheManager extends CacheManagerInteraction {
     return _encryptionKeyCacheClient.getItem(EncryptionKeyCache.keyCacheValue);
   }
 
-  Future<void> clear() {
-    return _encryptionKeyCacheClient
-        .deleteItem(EncryptionKeyCache.keyCacheValue);
-  }
-
   @override
   Future<void> migrateHiveToIsolatedHive() async {
     try {