The hypfs_dbfs_exit() have been removed since
commit 3325b4d8 ("s390/hypfs: factor out filesystem code"),
and now it is useless, so remove it.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Acked-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>