hotfix: etl/basic_stats: Drop log lines mining
GitlabLogFile extracts each line from the log trace file, but after a influxdb_client update it started to deliver bugs in the line protocal, as can be seen in the job below.
So, let's drop support for it, as it is not being used by any dashboard.
https: //gitlab.freedesktop.org/gfx-ci/mesa-performance-tracking/-/jobs/67735751