Remove chatty log from WiFiNative

When verbose debugging is enabled, every beacon frame generates a log
stating the DTIM value. This was left behind from development of DTIM
tracking.

BUG=29055049
TEST=unit tests
Change-Id: I3923536094b1894b940754101123f38518a5d519
1 file changed
tree: 265fdbc9cfff9547c6d2f03e7922ff12d1313990
  1. service/