Frameworks: Remove warning for SystemProperties.get

We now disallow non-UTF8 property values directly in property_service,
so there is no need for this warning.

This partially reverts 33aea8d40e6cc99f7968a6c6605a81a4587b85e7.

Bug: 63177684
Test: make
Change-Id: I61f49f635c6095013f55b906e00925a8cbd1ea8c
1 file changed