Remove DisplayInfo not found log

This log is spamming our test runs. It hasn't been very useful
historically, since we havent seen it in real usage.

We can bring back this log after setInputWindows is removed.

Bug: 198444055
Test: m inputflinger_tests && $ANDROID_HOST_OUT/nativetest64/inputflinger_tests/inputflinger_tests
Change-Id: Ica9fbbe4393b2ed9d09c506f681995cb9c550515
Merged-In: Ica9fbbe4393b2ed9d09c506f681995cb9c550515
(cherry picked from commit d5418b67)