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: 11d19f8d3ccc60cf7b6f7d5b42d2a66290686a86
  1. service/
  2. tests/