Revert "lava: Make the AUM tests logs work again the web UI"

This reverts commit 0dc36df3.

Revert this commit since it is breaking tests submission to LAVA with lqa tool started in Apertis environment:

Submitting job aum-ota-rollback-blacklist.yaml: <Fault 400: 'Problem with submitted job data: Loading job submission failed: while parsing a block mapping\n in "", line 2, column 1\ndid not find expected key\n in "", line 154, column 1.'>

Signed-off-by: Denis Pynkin denis.pynkin@collabora.com