Move G30 to cpp

Marlin/src/Marlin.cpp

  ***************** GCode Handlers *****************
  **************************************************/
 
-#if HAS_BED_PROBE
-  #include "gcode/probe/G30.h"
-  #if ENABLED(Z_PROBE_SLED)
-    #include "gcode/probe/G31_G32.h"
-  #endif
+#if ENABLED(Z_PROBE_SLED)
+  #include "gcode/probe/G31_G32.h"
 #endif
 
 #if ENABLED(G38_PROBE_TARGET)

Marlin/src/gcode/gcode.cpp

 //
 // Placeholders for non-migrated codes
 //
-extern void gcode_G30();
 extern void gcode_G31();
 extern void gcode_G32();
 extern void gcode_G38(bool is_38_2);
       #if HAS_BED_PROBE
 
         case 30: // G30 Single Z probe
-          gcode_G30();
+          G30();
           break;
 
         #if ENABLED(Z_PROBE_SLED)

Marlin/src/gcode/probe/G30.h → Marlin/src/gcode/probe/G30.cpp

  *
  */
 
+#include "../../inc/MarlinConfig.h"
+
+#if HAS_BED_PROBE
+
+#include "../gcode.h"
+#include "../../module/motion.h"
+#include "../../module/probe.h"
+#include "../../feature/bedlevel/bedlevel.h"
+
 /**
  * G30: Do a single Z probe at the current XY
  *
  *   Y   Probe Y position (default current Y)
  *   S0  Leave the probe deployed
  */
-void gcode_G30() {
+void GcodeSuite::G30() {
   const float xpos = parser.linearval('X', current_position[X_AXIS] + X_PROBE_OFFSET_FROM_EXTRUDER),
               ypos = parser.linearval('Y', current_position[Y_AXIS] + Y_PROBE_OFFSET_FROM_EXTRUDER);
 
 
   report_current_position();
 }
+
+#endif // HAS_BED_PROBE