Delete even more code related to the traffic simulation

src/gpu/GridGenerator/StreetPointFinder/JunctionReader.cpp

src/gpu/GridGenerator/StreetPointFinder/JunctionReader.h

src/gpu/GridGenerator/StreetPointFinder/SinkReader.cpp

src/gpu/GridGenerator/StreetPointFinder/SinkReader.h

src/gpu/GridGenerator/StreetPointFinder/SourceReader.cpp

src/gpu/GridGenerator/StreetPointFinder/SourceReader.h

...gpu/GridGenerator/StreetPointFinder/StreetPointFinder.cpp

src/gpu/GridGenerator/StreetPointFinder/StreetPointFinder.h

...taStructureInitializer/GridReaderFiles/BoundaryValues.cpp

...DataStructureInitializer/GridReaderFiles/BoundaryValues.h

src/gpu/VirtualFluids_GPU/GPU/GPU_Interface.h

src/gpu/VirtualFluids_GPU/GPU/GPU_Kernels.cuh

src/gpu/VirtualFluids_GPU/GPU/LBMKernel.cu

src/gpu/VirtualFluids_GPU/GPU/VelocityBCs27.cu

src/gpu/VirtualFluids_GPU/Parameter/Parameter.cpp

src/gpu/VirtualFluids_GPU/Parameter/Parameter.h

src/gpu/VirtualFluids_GPU/Parameter/ParameterTest.cpp

src/gpu/VirtualFluids_GPU/Parameter/parameterTest.cfg

test_data