glsl: Remove texture built-ins with 'bias' from 1.30 VS profile.

glsl: Remove texture built-ins with 'bias' from 1.30 VS profile.

From the GLSL 1.30 spec, section 8.7 "Texture Lookup Functions":
"In all functions below, the bias parameter is optional for fragment
 shaders.  The bias parameter is not accepted in a vertex shader."

This was a cut and paste mistake.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Paul Berry <stereotype441@gmail.com>