Routing: Clean unused code. (#1158)

modules/routing/strategy/BUILD

@@ -21,7 +21,6 @@ cc_library(
     deps = [
         "//modules/common",
         "//modules/common/proto:common_proto",
-        "//modules/common/util:map_util",
         "//modules/map/proto:map_proto",
         "//modules/routing/common:routing_gflags",
         "//modules/routing/graph",

modules/routing/strategy/a_star_strategy.cc

@@ -21,8 +21,6 @@
 #include <queue>
 
 #include "modules/common/log.h"
-#include "modules/common/util/map_util.h"
-
 #include "modules/routing/graph/sub_topo_graph.h"
 #include "modules/routing/graph/topo_graph.h"
 #include "modules/routing/graph/topo_node.h"
@@ -32,8 +30,6 @@ namespace apollo {
 namespace routing {
 namespace {
 
-using apollo::common::util::FindPtrOrNull;
-
 constexpr double LANE_CHANGE_SKIP_S = 10.0;
 
 struct SearchNode {