common: Remove ZLibOutStream::close virtual method.
common: Remove ZLibOutStream::close virtual method.

Unnecessary.

apitrace/apitrace,trtt/apitrace,trtt/apitrace,schulmar/apitrace,trtt/apitrace,apitrace/apitrace,trtt/apitrace,schulmar/apitrace,schulmar/apitrace,trtt/apitrace,apitrace/apitrace,schulmar/apitrace,schulmar/apitrace,apitrace/apitrace