smdk4412-common: init: remove duplicate socket contexts for wpa

Already set from the global file_contexts for /dev/socket/wpa_wlan[0-9],
they have no effect here

Change-Id: I7056ef311ee6636327a980f26b93f9fbfbd44b27
Merge "smdk4412-common: init: remove duplicate socket contexts for wpa" into cm-11.0