This should have no direct user impact.
We currently have two ways of sorting `#import` and `#include`
statements:
1. With our precommit script
2. With `clang-format` (via `git-clang-format`)
It *looks* like we aren't using `clang-format` (because of the
`SortIncludes: false` option in `.clang-format`) but we are,
which you can see by running `clang-format --dump-config`. As a separate
issue, it seems like we're not picking up the `clang-format`
configuration file (`clang-format --style=file:.clang-format
--dump-config` gives different results).
I've run into situations where the two of them "fight", so I think the
best thing to do is pick one. After some discussion, we decided to pick
`clang-format`.
f8afc58b42