define zone

I'm replacing Caching and Forwarding DNS server (called CS) in Bind 9.16.23
which forwards all client queries to specific server Z.

My doubts:

1)
This CS server doesn't use root server so I can delete in named.conf this
section ?
zone "." IN {
        type hint;
        file "named.ca";
};


2)
the original named.rfc1912.zones file contains these zones:
-------------------------------------------------
zone "localhost.localdomain" IN {
        type master;
        file "named.localhost";
        allow-update { none; };
};

zone "localhost" IN {
        type master;
        file "named.localhost";
        allow-update { none; };
};

zone
"1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa"
IN {
        type master;
        file "named.loopback";
        allow-update { none; };
};

zone "1.0.0.127.in-addr.arpa" IN {
        type master;
        file "named.loopback";
        allow-update { none; };
};

zone "0.in-addr.arpa" IN {
        type master;
        file "named.empty";
        allow-update { none; };
};
-------------------------------------------------



My old file contains the same entries, excluded zone
"1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa,
and It includes the followind extra ones:

zone "127.in-addr.arpa" {
        type master;
        file "db.127";
};
zone "255.in-addr.arpa" {
         type master;
         file "db.255";
};

file db.255
$TTL    604800
@       IN      SOA     localhost. root.localhost. (
                              1         ; Serial
                         604800         ; Refresh
                          86400         ; Retry
                        2419200         ; Expire
                         604800 )       ; Negative Cache TTL
;
@       IN      NS      localhost.


file db.127
$TTL    604800
@       IN      SOA     localhost. root.localhost. (
                              1         ; Serial
                         604800         ; Refresh
                          86400         ; Retry
                        2419200         ; Expire
                         604800 )       ; Negative Cache TTL
;
@       IN      NS      localhost.
1.0.0   IN      PTR     localhost.

What do you think ?
I can delete both "127.in-addr.arpa" and "255.in-addr.arpa"zones ?
And about
"1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa
zone ? I have t keep it ?

Thanks

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