ublk: remove "can't touch 'ublk_io' any more" comments

[blktests-ci]

Pull request for series with
subject: ublk: remove "can't touch 'ublk_io' any more" comments
version: 1
url: https://patchwork.kernel.org/project/linux-block/list/?series=1049050

[blktests-ci]

Upstream branch: d4b7351
series: https://patchwork.kernel.org/project/linux-block/list/?series=1049050
version: 1

Pull request is NOT updated. Failed to apply https://patchwork.kernel.org/project/linux-block/list/?series=1049050
error message:

Cmd('git') failed due to: exit code(128)
  cmdline: git am --3way
  stdout: 'Applying: ublk: remove "can't touch 'ublk_io' any more" comments
Patch failed at 0001 ublk: remove "can't touch 'ublk_io' any more" comments'
  stderr: 'error: sha1 information is lacking or useless (drivers/block/ublk_drv.c).
error: could not build fake ancestor
hint: Use 'git am --show-current-patch=diff' to see the failed patch
hint: When you have resolved this problem, run "git am --continue".
hint: If you prefer to skip this patch, run "git am --skip" instead.
hint: To restore the original branch and stop patching, run "git am --abort".
hint: Disable this message with "git config set advice.mergeConflict false"'

conflict: