### What it does
Checks for private functions that only return `Ok` or `Some`.

### Why is this bad?
It is not meaningful to wrap values when no `None` or `Err` is returned.

### Known problems
There can be false positives if the function signature is designed to
fit some external requirement.

### Example
```
fn get_cool_number(a: bool, b: bool) -> Option<i32> {
    if a && b {
        return Some(50);
    }
    if a {
        Some(0)
    } else {
        Some(10)
    }
}
```
Use instead:
```
fn get_cool_number(a: bool, b: bool) -> i32 {
    if a && b {
        return 50;
    }
    if a {
        0
    } else {
        10
    }
}
```