mesa: Get rid of _mesa_active_fragment_shader_has_side_effects
mesa: Get rid of _mesa_active_fragment_shader_has_side_effects

It is no longer used.

Signed-off-by: Jason Ekstrand <68c46a606457643eab92053c1c05574abb26f861@jlekstrand.net>
Reviewed-by: Kenneth Graunke <bd2562f754ec92342f93f61c25d731e290a2ffa8@whitecape.org>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler