This removes support for Ledger HW.1 and "Nano" (non-S) devices.
These were manufactured/sold around 2015-2016, and are long unsupported by the upstream vendor.
We previously added a deprecation warning to the GUI [0] released in 4.3.3 (2023-01-02), to warn owners of these devices.
This PR now fully removes support.
As a consequence, the unmaintained btchip-python dependency can now be removed, which solves [1].
[0]: 9b82eb6d06
[1]: https://github.com/spesmilo/electrum/issues/9370#issuecomment-2593675364
Notes
The frozen dependency lists in this folder are generated files.
- Starting from
contrib/requirements/requirements*.txt, - we use the
contrib/freeze_packages.shscript, - to generate
contrib/deterministic-build/requirements*.txt.
The source files list direct dependencies with loose version requirements, while the output files list all transitive dependencies with exact version+hash pins.
The build scripts only use these hash pinned requirement files.