configure.ac: drop grub Makefile.in generation
Not needed anymore.
@@ -8,7 +8,7 @@ AC_CONFIG_HEADER([config.h])
AC_CONFIG_FILES([Makefile
contrib/Makefile
contrib/alpine/Makefile contrib/alpine/finit.d/Makefile contrib/alpine/finit.d/available/Makefile
- contrib/debian/Makefile contrib/debian/finit.d/Makefile contrib/debian/finit.d/available/Makefile contrib/debian/grub.d/Makefile
+ contrib/debian/Makefile contrib/debian/finit.d/Makefile contrib/debian/finit.d/available/Makefile
contrib/void/Makefile contrib/void/finit.d/Makefile contrib/void/finit.d/available/Makefile
doc/Makefile
plugins/Makefile
