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