reiserfs: remove unused sched_count variable

clang with W=1 reports
fs/reiserfs/journal.c:3034:6: error: variable
  'sched_count' set but not used [-Werror,-Wunused-but-set-variable]
        int sched_count = 0;
            ^
This variable is not used so remove it.

Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230326204459.1358553-1-trix@redhat.com>