Consider the usage of orix.scalar.Scalar

[pc494]

Actually, I avoid using orix.scalar.Scalar wherever I can, because I don't like writing and reading code where the .data is
needed to get the NumPy array. I haven't looked at the reason why we need Scalar, it might a good one, perhaps it enables
us to not check for instance shapes or something similar, but I would be interested in seeing if we can remove completely.

Originally posted by @hakonanes in #197 (comment)

I think this is a broadly fair assessment and worth looking into. The Scalar class can be a nuisance.

[harripj]

As @hakonanes mentioned this again in #264, it may be worth having a discussion here. From having looked at the code I don't know what benefit we get from the Scalar class other than being an extra (unnecessary) abstraction over a NumPy array and extra .data calls. Personally I would be in favour of trying to remove it.

[harripj]

Closed by #301 .