Odd usage/API of PolynomialCommitment trait associated error

Hey!
I've been with the `ark-poly-commit` library.
And I have my `Error` enum where inside I have an `ArkPolyCommit` error variant.

The issue is that seems I can't do:
```rust
pub fn universal_setup(
max_degree: usize,
rng: &mut R,
) -> Result, MyError> {
PC::setup(max_degree, None, rng)
.map_err(|err| ark_poly_commit::Error::from)?
}
```
Nor
```rust
pub fn universal_setup(
max_degree: usize,
rng: &mut R,
) -> Result, MyError> {
PC::setup(max_degree, None, rng)?
}
```

And I have the `From for MyError` ofc.

The issue I see is that `PolynomialCommitment` has an associated Error type. And although the associated trait bounds seem correct. I can't make it work as requires me to add generics in all my errors where this should not be necessary.
See: https://github.com/arkworks-rs/poly-commit/blob/master/src/lib.rs#L174

Wondering how does people sort this out without ugly solutions like https://github.com/ZK-Garage/plonk/blob/master/plonk-core/src/error.rs#L96-L107.

Ideally, can't we remove the `Error` type from the trait and just leave the regular error? This would make integration within enums much easier.