which options of Ethernet should i delete from my kernel?

[FLYING LI]

there is only one Realtek 8029 Ethernet card in my
computer.below is the result of dmesg command:
# dmesg|grep Ethernet
ed0: <NE2000 PCI Ethernet (RealTek 8029)> port   
0xec00-0xec1f irq 11 at device 12.0 on pci0
and this is abstract from my kernel:
# PCI Ethernet NICs that use the common MII bus
controller code.
# NOTE: Be sure to keep the 'device miibus' line in
order to use these NICs!
device          miibus          # MII bus support
device          dc              # DEC/Intel 21143 and
various workalikes
device          fxp             # Intel EtherExpress
PRO/100B (82557, 82558)
device          pcn             # AMD Am79C97x PCI
10/100 NICs
device          rl              # RealTek 8129/8139
device          sf              # Adaptec AIC-6915
(``Starfire'')
device          sis             # Silicon Integrated
Systems SiS 900/SiS 7016
device          ste             # Sundance ST201
(D-Link DFE-550TX)
device          tl              # Texas Instruments
ThunderLAN
device          tx              # SMC EtherPower II
(83c170 ``EPIC'')
device          vr              # VIA Rhine, Rhine II
device          wb              # Winbond W89C840F
device          xl              # 3Com 3c90x
(``Boomerang'', ``Cyclone'')
device          bge             # Broadcom BCM570x
(``Tigon III'')

# ISA Ethernet NICs.
# 'device ed' requires 'device miibus'
device          ed0     at isa? port 0x280 irq 10
iomem 0xd8000

# The probe order of these is presently determined by
i386/isa/isa_compat.c.
device          ie0     at isa? port 0x300 irq 10
iomem 0xd0000
#device         le0     at isa? port 0x300 irq 5 iomem
0xd0000
device          lnc0    at isa? port 0x280 irq 10 drq
0
device          cs0     at isa? port 0x300
device          sn0     at isa? port 0x300 irq 10

# Pseudo devices - the number indicates how many units
to allocate.
pseudo-device   loop            # Network loopback
pseudo-device   ether           # Ethernet support
pseudo-device   pty             # Pseudo-ttys (telnet
etc)
pseudo-device   md              # Memory "disks"
pseudo-device   gif             # IPv6 and IPv4
tunneling
pseudo-device   faith   1       # IPv6-to-IPv4
relaying (translation)

# The `bpf' pseudo-device enables the Berkeley Packet
Filter.
# Be aware of the administrative consequences of
enabling this!
pseudo-device   bpf             #Berkeley packet
filter

now i want to delete those options have nothing to do
with my Ethernet.and i have learned that the "device
ed0" is necessary cause there was a qusion "would you
like to Bring up the ed0 interface right now?" in the
progress of system installing.i have tried to delete
some options of Ethernet serveral times,but
unfortunately,my computer can not boot.and i am sure
that the kernel i pasted above is correctly
configured.So,if you do know which options can be
deleted safety.tell me please.thank you very much!
wish everyone a happy day!

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