remove unused FW binaries

[szymonlesisz]

currently we are able to work with T1 >= 1.80 and TT >= 2.1.0. other emulators wont start.
We can save up some space by not downloading them

[grdddj]

What are the issues with older emulators? At least locally I was able to spawn even the oldest ones currently (1.6.x and 2.0.x)

[szymonlesisz]

i guess it's kinda related to #18, you can run it but you are not able to work with it

running tests against lower versions fails on setup with:

CONTROLLER: Traceback (most recent call last):
  File "/Workspace/trezor-user-env/src/controller.py", line 63, in get_response
    command_response = self.run_command_and_get_its_response()
  File "/Workspace/trezor-user-env/src/controller.py", line 98, in run_command_and_get_its_response
    return self.run_emulator_command()
  File "/Workspace/trezor-user-env/src/controller.py", line 155, in run_emulator_command
    emulator.setup_device(
  File "/Workspace/trezor-user-env/src/emulator.py", line 239, in setup_device

i guess there will be more issues related to that, like DebugLink decisions etc.

[tsusanka]

As discussed on our meeting: let's do this server-side and let's not delete them directly, rather move them to some "archive" folder.