drirc: drop support for Heaven 3.0, fixes tessellation in 4.0
drirc: drop support for Heaven 3.0, fixes tessellation in 4.0

Reviewed-by: Kenneth Graunke <bd2562f754ec92342f93f61c25d731e290a2ffa8@whitecape.org>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler