Revert "[dsymutil] Gather function ranges during DIE selection."

This reverts commit r231957.

IntervalMap currently doesn't support keys more aligned than host pointers
and I've been using it with uint64_t keys. This asserts on some 32bits
systems.

Revert while I work on an IntervalMap generalization.

llvm-svn: 231967
GitOrigin-RevId: df41a3025005af41593fbd16a8f82b62fdea813c
1 file changed