i915: Remove intel_display_trace.c

[emaste]

It carries a GPL SPDX tag, which is probably spurious. However, we don't compile this anyway so just remove it.

Sponsored by: The FreeBSD Foundation

[emaste]

I've emailed the author of intel_display_trace.c to suggest the GPL SPDX tag is probably inadvertent, so perhaps this will be addressed with a later update. We can always bring the file back if we want to start building it, of course.

I have also proposed a patch to update the license for a couple of other files: https://lists.freedesktop.org/archives/intel-gfx/2024-December/362042.html.

Excluding the three mentioned above by my count we have 7 GPL headers and 5 GPL c files remaining.