i965: Delete some unnecessary code in brw_report_shader_time().

i965: Delete some unnecessary code in brw_report_shader_time().

It is true that a gl_shader_program with ID 0 will be a fixed-function
fragment program; a gl_program with ID 0 but NULL gl_shader_program
means that it's a fixed-function vertex shader.

But that's not terribly interesting or relevant to what we're doing.
We just need to know that ID 0 means "fixed function".

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>