generics2 is a bit too easy

The struct is actually generic over `u32`:
```rust
struct Wrapper<u32> {
    value: u32
}
```

so no modifications to the struct are necessary to complete the exercise. You only have to comment out the old assert and uncomment the new one and you're done.

The example struct definition should probably be
```rust
struct Wrapper {
    value: u32
}
```
