Remove superflous iostreams include from header files (#6901)

src/util/coordinate.cpp

@@ -1,16 +1,8 @@
-#include "util/coordinate_calculation.hpp"
-
-#ifndef NDEBUG
-#include "util/log.hpp"
-#endif
 #include "osrm/coordinate.hpp"
 
-#ifndef NDEBUG
-#include <bitset>
-#endif
-#include <iomanip>
-#include <iostream>
-#include <limits>
+#include "util/coordinate_calculation.hpp"
+
+#include <cstdint>
 
 namespace osrm::util
 {

src/util/exception.cpp

@@ -1,7 +1,5 @@
 #include "util/exception.hpp"
 
-#include <utility>
-
 // This function exists to 'anchor' the class, and stop the compiler from
 // copying vtable and RTTI info into every object file that includes
 // this header. (Caught by -Wweak-vtables under Clang.)

src/util/guidance/turn_lanes.cpp

@@ -1,11 +1,7 @@
 #include "util/guidance/turn_lanes.hpp"
 
-#include <algorithm>
-#include <iostream>
 #include <tuple>
 
-#include <boost/assert.hpp>
-
 namespace osrm::util::guidance
 {
 LaneTuple::LaneTuple() : lanes_in_turn(0), first_lane_from_the_right(INVALID_LANEID)