Code action `inline_bounds` (the opposite of `move_bounds_to_where_clause`)

I'd like to easily convert this
```rust
pub fn serialize<S>(num: u32, serializer: S) -> Result<S::Ok, S::Error>
where
    S: Serializer,
{
    Ok(())
}
```

to this

```rust
pub fn serialize<S: Serializer>(num: u32, serializer: S) -> Result<S::Ok, S::Error> {
    Ok(())
}
```

basically the opposite of `move_bounds_to_where_clause`