Fix rpi image creation broken since to #6087

[viraniac]

Description

The raspberry pi images were broken since #6087 as armbian.list was no longer available to install the required packages. As the description for #6087 mentioned that the change was just to remove the dormant armbian.list.disabled file, this PR does the same simply by removing the file if its present after image-late.

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also note any relevant details for your test configuration.

• Tested creating Raspberry pi images and also verifying that there is no leftover armbian.list.disabled file.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

[igorpecovnik]

It fixes the bug, so lets merge and deal with related firmware mess some other day.