liblog: remove operator overloads from log_msg

No one's using them and it's not intuitive how they would be used.

Test: build
Change-Id: I8d49825be2e7ecee9834060260b1c59c30664f1d
1 file changed
tree: 21f5e980b7ee9921c156f3fb5442ac758f3bdca1
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/