r600g: Delete unused variable 'max_global_size' in 'r600_get_compute_param'
r600g: Delete unused variable 'max_global_size' in 'r600_get_compute_param'

Signed-off-by: Dieter Nützel <902ea9f4f1fbe947e8e8c77ca59f21dfca158b7e@nuetzel-hh.de>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler