[Chapel Merge] Revert "Enable LLVM by default"

Branch: refs/heads/master
Revision: 35f8278
Author: daviditen
Log Message:

Merge pull request #17582 from daviditen/revert-llvm-enabled

Revert "Enable LLVM by default"

This reverts commit 8551273.

Signed-off-by: David Iten daviditen@users.noreply.github.com

Modified Files:
M third-party/llvm/Makefile

M util/chplenv/chpl_llvm.py

Compare: https://github.com/chapel-lang/chapel/compare/d9b3acc6380c...35f82787f4ee