Remove bootloadertest's contents

This makefile installs files in an unusual way that doesn't work with
hermetic partition builds.

I don't think this test is used, because:
  - It appears to be a host test that interacts with the device, given
    that it runs adb and fastboot. So it shouldn't need to be installled
    on the device.
  - It doesn't install the adb or fastboot libraries, so it won't run
    on device.
  - The only references to it are in instructions in google3 to run the
    python files directly for manual testing.

However, there are also references to it in old branches, so keep the
module definition around for now.

Bug: 205632228
Test: Presubmits

Change-Id: I187be3751b8b2683f6bd4026b2cd977e758a475c
2 files changed