remove duplicate description about rawProps

Author: junichi-chiba

src/guide/components/props.md

@@ -401,7 +401,6 @@ defineProps({
     // a factory function. The function receives the raw
     // props received by the component as the argument.
     default(rawProps) {
-      // default function receives the raw props object as argument
       return { message: 'hello' }
     }
   },
@@ -455,7 +454,6 @@ export default {
       // a factory function. The function receives the raw
       // props received by the component as the argument.
       default(rawProps) {
-        // default function receives the raw props object as argument
         return { message: 'hello' }
       }
     },