util: remove Sun C Compiler support
util: remove Sun C Compiler support

Support for this compiler was dropped in 51564f04b77e6

Acked-by: Edward O'Callaghan <b035da0d7e151e09fe2005f3a7bc526beb9b3245@folklore1984.net>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler