Remove duplicate and incorrect size check
Remove duplicate and incorrect size check

Minimum header sizes are already checked in each `case` arm below. Worse, the
ICMP entries in transportProtocolMinSizes are incorrect, and produce false "raw
packet" logs.

PiperOrigin-RevId: 315730073

google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor