D104718 (commit 7bb7fa12e73b) introduced the TODO comment, along with
code for opaque pointer handling in Type::getPointerTo.
Later, D104902 (commit 1e6303e60ca5) removed the separate opaque pointer
handling code in Type::getPointerTo. Thus, getting rid of
Type::getPointerTo seems no longer unnecessary.
clang-format not found in user’s local PATH; not linting file.