By default, /etc/samba/smb.conf has the following, which is used to share printers.

[global]
        workgroup = SAMBA
        security = user

        passdb backend = tdbsam

        printing = cups
        printcap name = cups
        load printers = yes
        cups options = raw

[homes]
        comment = Home Directories
        valid users = %S, %D%w%S
        browseable = No
        read only = No
        inherit acls = Yes

[printers]
        comment = All Printers
        path = /var/tmp
        printable = Yes
        create mask = 0600
        browseable = No

[print$]
        comment = Printer Drivers
        path = /var/lib/samba/drivers
        write list = @printadmin root
        force group = @printadmin
        create mask = 0664
        directory mask = 0775

Updating /etc/samba/smb.conf to have the following will make it so that Samba does not share printers.

[global]
        workgroup = SAMBA
        security = user
        passdb backend = tdbsam

        load printers = no
        printing = bsd
        printcap name = /dev/null
        disable spoolss = yes

[homes]
        comment = Home Directories
        valid users = %S, %D%w%S
        browseable = No
        read only = No
        inherit acls = Yes