Revert "compiler: don't use `@abs` builtin yet"

This reverts commit 21780899eb17a0cb795ff40e5fae6556c38ea13e.

After this commit, a version of the compiler which supports the new
`@abs` builtin is required.
1c02e58fc0Andrew Kelley committed on 9/27/2023, 6:23:28 PMparent2178089
3 files changedLine totals unavailable