Remove long-stale ext3 defconfig option

Inspired by commit c065b604 ("Use CONFIG_EXT4_FS instead of
CONFIG_EXT3_FS in all of the defconfigs") I looked around for any other
left-over EXT3 config options, and found some old defconfig files still
mentioned CONFIG_EXT3_DEFAULTS_TO_ORDERED.

That config option was removed a decade ago in commit c290ea01 ("fs:
Remove ext3 filesystem driver").  It had a good run, but let's remove it
for good.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>