Revert "Restore optimization. BT_USE_NEON was preventing it, and is not needed since the Bullet static lib is pre-compiled with Neon."

This reverts commit af20eb05a0609a7f83c3c67577f0ec0b1492446b.
Merge pull request #981 from kwhatmough/next

Reverts my last commit until I can fix the runtime issue with neon