Returning a license on unity 2019 causes library reimport

[Jon-ScaryBeasties]

Bug description

When the return_license.sh step is called, when using Unity 2019, the library is reimported as the command line script opens up Unity, with the last open project, but switches platform target to Linux Standalone. This wastes upwards of 10 minutes on projects waiting for this step to complete before being able to deal with the final binary.

How to reproduce

Build a project using Unity 2019 for Android, and observe the return license step

• Expected behavior

Unity does not reopen a project and cause the library to be reimported.