fstests: remove duplicate initialization in the testcase

fstests: remove duplicate initialization in the testcase

_begin_fstest() already initializes several variables, including `seq` and
`seqres`, so remove those redundant initializations from the testcase.

Also, ext4/053 unnecessarily re-initializes `here`, `tmp`, and `status`,
which `_begin_fstest` already handles. Remove those as well.

and remove template comment.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>