Revert "fs_mgr: Allow ext2/3/4 to mount as ext4"

        /* Skip fstab entries for partitions that we KNOW are wrong */

        detected_fs_type = blkid_get_tag_value(NULL, "TYPE", fstab->recs[i].blk_device);

        if (detected_fs_type) {

            int cmp_len = strlen(detected_fs_type);

            /* ext formats are mutually compatible by design */

            if (!strncmp(detected_fs_type,"ext", 3) && cmp_len == 4) {

                cmp_len = 3;

            }

            if (strncmp(fstab->recs[i].fs_type, detected_fs_type, cmp_len)) {

        if (detected_fs_type && strcmp(fstab->recs[i].fs_type, detected_fs_type) != 0) {

            continue;

        }

        }

        int last_idx_inspected;

        mret = mount_with_alternatives(fstab, i, &last_idx_inspected, &attempted_idx);