fix roundabout handling with lanes

instead of artificially removing lanes from a roundabout, we don't assing them in the first place.
this also prevents a problem where we would end up collapsing turns with lanes in a roundabout

src/extractor/guidance/roundabout_handler.cpp

@@ -3,8 +3,8 @@
 
 #include "util/bearing.hpp"
 #include "util/coordinate_calculation.hpp"
-#include "util/log.hpp"
 #include "util/guidance/name_announcements.hpp"
+#include "util/log.hpp"
 
 #include <algorithm>
 #include <cmath>