Remove check for homogeneous array

[sethcall]

In conformance with latest TOML spec...

[ksunden]

My reading of the code indicates that with this change atype is not at all used anywhere and so the variable can simply be removed entirely (and then also ntype for that matter (i.e. doing nval, _ = self.load_value(a[i]) to indicate that the returned value is not used))

[zoj613]

ping @uiri

[sudo-nano]

@uiri Still running into this issue in 2025. Please merge the PR.

[sudo-nano]

It appears that a commit fixing this issue was introduced here 6d51c0a in 2023, but has not been pushed to release in the two years since. It seems like this library is unmaintained, and people should perhaps switch to tomli or another library.