chore: remove FADE_CLASS_NAME_MAP and IMAGE_PREVIEW_MASK_CLASS_NAME (#8912)

Author: Laffery

components/image/image-config.ts

@@ -5,14 +5,4 @@
 
 import { NzConfigKey } from 'ng-zorro-antd/core/config';
 
-/** @deprecated Will be removed in v19. */
-export const FADE_CLASS_NAME_MAP = {
-  enter: 'ant-fade-enter',
-  enterActive: 'ant-fade-enter-active',
-  leave: 'ant-fade-leave',
-  leaveActive: 'ant-fade-leave-active'
-};
-
-/** @deprecated Will be removed in v19. */
-export const IMAGE_PREVIEW_MASK_CLASS_NAME = 'ant-image-preview-mask';
 export const NZ_CONFIG_MODULE_NAME: NzConfigKey = 'image';