Revert "add an any and a union type example for prop annotation"

This reverts commit f2210bf

Author: gamperl

src/guide/typescript-support.md

@@ -247,17 +247,13 @@ interface Book {
 const Component = defineComponent({
   props: {
     name: String,
-    id: [Number, String],
     success: { type: String },
     callback: {
       type: Function as PropType<() => void>
     },
     book: {
       type: Object as PropType<Book>,
       required: true
-    },
-    metadata: {
-      type: null // metadata is typed as any
     }
   }
 })