* Remove unused -[FIRFirestore isLoggingEnabled]
Use util::LogIsLoggable(util::kLogLevelDebug) directly.
* Remove objc_compatibility.h
* Remove/cleanup unused #if __OBJC__ blocks
* Remove dead code
* Remove MakeNSStringNoCopy
* Remove worthless include
* Tidy up FIRFirestore
* Remove dead code and use forward declarations in FSTHelpers
* Minor fixes for LevelDbTransaction:
* Make methods const where possible
* Make key() and value() return const std::string&, allowing callers
to create their own const references
* Remove Comparator<NSString*>
Gil
6cc1a449ea