Removed EventLogger &logger = EventLogger::getInstance(); from slam_solver.cpp
Removed EventLogger &logger = EventLogger::getInstance(); from slam_solver.cpp

This instance is a singleton and is already declared in event_logger.cpp
(the only code that must retrieve a reference to the instance are user code e.g. code
in int main(..) function).

natalnet-lpr/rgbd_rtk,natalnet-lpr/rgbd_rtk,natalnet-lpr/rgbd_rtk