Revert "MultiArrayList: Fix error when struct is 0 sized"

This reverts commit 1f10cf4edf2b645e63dedc42f5d7475914bf2311.

Re-opens #10618

I want to solve this a different way. `align(S)` where S is a 0-byte
type should work in this context.

This also caused issues such as
https://github.com/Vexu/arocc/issues/221
913d61ebb9Andrew Kelley committed on 1/25/2022, 4:29:04 AMparent2e9ce6f
2 files changedLine totals unavailable