mesa: remove ARB_geometry_shader4

No drivers currently implement ARB_geometry_shader4, nor are there
any plans to implement it.  We only support the version of geometry
shaders that was incorporated into OpenGL 3.2 / GLSL 1.50.

Signed-off-by: Marta Lofstedt <marta.lofstedt@linux.intel.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
11 files changed