message: fix: remove import handle
diff: @@ -598,7 +598,7 @@ completion:(void (^)(NSError *error))completion
  }
  - (void)importWallet:(NSString *)config
  - completion:(void (^)(NSError *error, NSInteger importHandle))completion {
  + completion:(void (^)(NSError *error))completion {
  vcx_error_t ret;
  vcx_command_handle_t handle = [[VcxCallbacks sharedInstance] createCommandHandleFor:completion];
  ret = vcx_wallet_import(handle, [config cString], VcxWrapperCommonCallback);
  @@ -608,7 +608,7 @@ completion:(void (^)(NSError *error))completion
  [[VcxCallbacks sharedInstance] deleteCommandHandleFor: handle];
  dispatch_async(dispatch_get_main_queue(), ^{
  - completion([NSError errorFromVcxError: ret], 0);
  + completion([NSError errorFromVcxError: ret]);
  });
  }
  }
  