intel: Drop the INTEL_STRICT_CONFORMANCE environment variable.

intel: Drop the INTEL_STRICT_CONFORMANCE environment variable.

If you want to test the graphics driver, you want to test it under the
conditions that users will see, not some set of additional fallbacks.
If you want to test swrast, run the swrast driver (or no_rast=true)
instead.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>