s5j/mac: drop udp_initialize() and udp_free()
s5j/mac: drop udp_initialize() and udp_free()

udp_initialize() and udp_free() are never called and not in use.

Change-Id: I230ce1837f5cde920d9d7a1656cdf79a4a9d3950
Signed-off-by: Heesub Shin <45471ea77bd08f3d26635f3f5adb40ba41250a2b@samsung.com>

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