Remove unused argument from skqp command-line tool.

This only affected one helper script; the others just automatically
forward any user-specified arguments.

Reviewed-on: https://skia-review.googlesource.com/c/skia/+/517356
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Change-Id: I6de3d019c272ae46a5a053fd1b8e6d964105fe05
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/522987
Reviewed-by: John Stiles <johnstiles@google.com>
2 files changed