Fewer includes of vector_3.h

Marlin/src/core/serial.cpp

     print_xyz(prefix, suffix, xyz[X_AXIS], xyz[Y_AXIS], xyz[Z_AXIS]);
   }
 
-  #if HAS_ABL
-    void print_xyz(const char* prefix, const char* suffix, const vector_3 &xyz) {
-      print_xyz(prefix, suffix, xyz.x, xyz.y, xyz.z);
-    }
-  #endif
-
 #endif

Marlin/src/core/serial.h

 
 #include "../inc/MarlinConfig.h"
 
-#if HAS_ABL && ENABLED(DEBUG_LEVELING_FEATURE)
-  #include "../libs/vector_3.h"
-#endif
-
 /**
  * Define debug bit-masks
  */
 #if ENABLED(DEBUG_LEVELING_FEATURE)
   void print_xyz(const char* prefix, const char* suffix, const float x, const float y, const float z);
   void print_xyz(const char* prefix, const char* suffix, const float xyz[]);
-  #if HAS_ABL
-    void print_xyz(const char* prefix, const char* suffix, const vector_3 &xyz);
-  #endif
   #define DEBUG_POS(SUFFIX,VAR) do { print_xyz(PSTR("  " STRINGIFY(VAR) "="), PSTR(" : " SUFFIX "\n"), VAR); } while(0)
 #endif
 

Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp

   #include "../../../feature/bedlevel/bedlevel.h"
   #include "../../../libs/least_squares_fit.h"
 
-#include "../../../feature/Max7219_Debug_LEDs.h"
+  #include "../../../feature/Max7219_Debug_LEDs.h"
 
   #include <math.h>
 
 
   #if HAS_BED_PROBE
 
+    #include "../../../libs/vector_3.h"
+
     void unified_bed_leveling::tilt_mesh_based_on_probed_grid(const bool do_3_pt_leveling) {
       constexpr int16_t x_min = max(MIN_PROBE_X, MESH_MIN_X),
                         x_max = min(MAX_PROBE_X, MESH_MAX_X),

Marlin/src/gcode/bedlevel/abl/G29.cpp

   #include "../../../libs/least_squares_fit.h"
 #endif
 
+#if ABL_PLANAR
+  #include "../../../libs/vector_3.h"
+#endif
+
 #if ABL_GRID
   #if ENABLED(PROBE_Y_FIRST)
     #define PR_OUTER_VAR xCount

Marlin/src/libs/vector_3.cpp

 
 #include "../inc/MarlinConfig.h"
 
-#if HAS_ABL
+#if ABL_PLANAR || ENABLED(AUTO_BED_LEVELING_UBL)
 
 #include "vector_3.h"
 

Marlin/src/module/planner.h

   #include "delta.h"
 #endif
 
-#if HAS_ABL
+#if ABL_PLANAR
   #include "../libs/vector_3.h"
 #endif