RAiDER.cli.raider.py::combine_files_using_azimuth_time is unused

[garlic-os]

The function combine_files_using_azimuth_time() in raider.py is not used. It also appears to have several errors that would cause a runtime error should it run:

• Parameter declaration "times" is obscured by a declaration of the same name — Pylance(reportRedeclaration)
• Expected 3 positional arguments in time_grid = get_time_grid_for_aztime_interp(datasets, times, t, model) — Pylance(reportCallIssue)

As of dev branch commit 077674f.