rm extra code

Author: EskiMojo14

docs/migrations/1.x-to-2.x.md

@@ -764,10 +764,6 @@ const createSlice = buildCreateSlice({
     asyncThunk: asyncThunkCreator,
   },
 })
-
-const todoSlice = createSlice({
-  name: 'todos',
-})
 ```
 
 We're not sure how many people/libraries would actually make use of this though, so any feedback over on the [Github issue](https://github.com/reduxjs/redux-toolkit/issues/3837) is welcome!