remove incorrect assert regarding 128-bit integers

LLVM incorrectly reports 8 as the alignment of i128 on x86_64 but it
correctly reports 16 as the alignment of i128 on aarch64.

closes #3101
81c441f885Andrew Kelley committed on 8/21/2019, 1:17:57 AMparent3b5a885
1 file changedLine totals unavailable