Remove wfDebugLog() call from wfSetupSession()

Since Iffba121a99 (00b7f76) with the removal of wfHttpOnlySafe(),
session cookie's parameters are based only on configuration
settings, so there is no point to spam the "cookie" log group
with predicitible values.

Change-Id: I8b1cdea929cefc32dd8b01c2ecbf2d76bb64189f
Merge "Remove wfDebugLog() call from wfSetupSession()"