i965: Drop unnecessary brw->gen >= 8 check from scalar VS code.
i965: Drop unnecessary brw->gen >= 8 check from scalar VS code.

brw->scalar_vs already implies that brw->gen >= 8.

Signed-off-by: Kenneth Graunke <bd2562f754ec92342f93f61c25d731e290a2ffa8@whitecape.org>
Reviewed-by: Jordan Justen <a79006884ba9cf5f4f7fcbb92a15b208780d8c97@intel.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler