Remove stale reference to non-Gallium nouveau driver from configure.ac.
diff --git a/configure.ac b/configure.ac
index 2a9ac1e..f1ff3d4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -642,7 +642,7 @@
AC_ARG_WITH([dri-drivers],
[AS_HELP_STRING([--with-dri-drivers@<:@=DIRS...@:>@],
[comma delimited DRI drivers list, e.g.
- "swrast,i965,radeon,nouveau" @<:@default=auto@:>@])],
+ "swrast,i965,radeon" @<:@default=auto@:>@])],
[with_dri_drivers="$withval"],
[with_dri_drivers=yes])
if test "x$with_dri_drivers" = x; then