docs(progress): remove outdated resize method (#12412)

packages/vant/src/progress/README.md

@@ -77,17 +77,6 @@ The component exports the following type definitions:
 import type { ProgressProps, ProgressInstance } from 'vant';
 ```
 
-`ProgressInstance` is the type of component instance:
-
-```ts
-import { ref } from 'vue';
-import type { ProgressInstance } from 'vant';
-
-const progressRef = ref<ProgressInstance>();
-
-progressRef.value?.resize();
-```
-
 ## Theming
 
 ### CSS Variables

packages/vant/src/progress/README.zh-CN.md

@@ -81,17 +81,6 @@ app.use(Progress);
 import type { ProgressProps, ProgressInstance } from 'vant';
 ```
 
-`ProgressInstance` 是组件实例的类型，用法如下：
-
-```ts
-import { ref } from 'vue';
-import type { ProgressInstance } from 'vant';
-
-const progressRef = ref<ProgressInstance>();
-
-progressRef.value?.resize();
-```
-
 ## 主题定制
 
 ### 样式变量

packages/vant/src/progress/types.ts

@@ -1,14 +1,7 @@
 import type { ComponentPublicInstance } from 'vue';
 import type { ProgressProps } from './Progress';
 
-export type ProgressExpose = {
+export type ProgressInstance = ComponentPublicInstance<ProgressProps>;
-  resize: () => void;
-};
-
-export type ProgressInstance = ComponentPublicInstance<
-  ProgressProps,
-  ProgressExpose
->;
 
 export type ProgressThemeVars = {
   progressHeight?: string;