bcachefs: Delete duplicate time stats initialization

This code duplicated initialization already done in
bch2_fs_btree_iter_init().
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/super.c

@@ -960,12 +960,6 @@ int bch2_fs_start(struct bch_fs *c)
 		bch2_dev_allocator_add(c, ca);
 	bch2_recalc_capacity(c);
 
-	for (i = 0; i < BCH_TRANSACTIONS_NR; i++) {
-		mutex_lock(&c->btree_transaction_stats[i].lock);
-		bch2_time_stats_init(&c->btree_transaction_stats[i].lock_hold_times);
-		mutex_unlock(&c->btree_transaction_stats[i].lock);
-	}
-
 	ret = BCH_SB_INITIALIZED(c->disk_sb.sb)
 		? bch2_fs_recovery(c)
 		: bch2_fs_initialize(c);