[PATCH 4.14/4.19/5.4/5.10/5.15 0/1] fs: reiserfs: remove useless new_opts in reiserfs_remount

[Fedor Pchelkin]

As described in the following commit info, new_opts value is not used
anymore and is not cleaned on non-error paths -- it is a leak. The problem
has been fixed by the following patch which can be cleanly applied
to 4.14, 4.19, 5.4, 5.10, 5.15 branches.