mke2fs: Simple man page nodiscard option correction

It is not true that 'nodiscard' is set as default, so remove this
sentence. The default is 'discard' and it is properly documented in man
page.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
1 file changed