The `__future__` we relied on is now, where the 3 specific things are
all included [since Python 3.0](https://docs.python.org/3/library/__future__.html):
* absolute_import
* print_function
* unicode_literals
* division
These import statements are no-ops and are no longer necessary.
This will let me:
1. Add -Osize support easily.
2. Put all of the binaries in the same directory so that Benchmark_Driver can
work with them via the -tools argument.
