Move TarjanSCC from extractor to util (#6562)

include/util/matrix_graph_wrapper.hpp

@@ -10,7 +10,7 @@
 namespace osrm::util
 {
 
-// This Wrapper provides all methods that are needed for extractor::TarjanSCC, when the graph is
+// This Wrapper provides all methods that are needed for util::TarjanSCC, when the graph is
 // given in a matrix representation (e.g. as output from a distance table call)
 
 template <typename T> class MatrixGraphWrapper

include/util/tarjan_scc.hpp

@@ -22,7 +22,7 @@
 #include <stack>
 #include <vector>
 
-namespace osrm::extractor
+namespace osrm::util
 {
 
 template <typename GraphT> class TarjanSCC
@@ -178,6 +178,6 @@ template <typename GraphT> class TarjanSCC
 
     unsigned GetComponentID(const NodeID node) const { return components_index[node]; }
 };
-} // namespace osrm::extractor
+} // namespace osrm::util
 
 #endif /* TARJAN_SCC_HPP */