Reverted Z-Homing-Height limit

Marlin/Configuration.h

 
 // @section homing
 
-#define Z_HOMING_HEIGHT 10  // (in mm) Minimal z height before homing (G28) for Z clearance above the bed, clamps, ...
+#define Z_HOMING_HEIGHT 0  // (in mm) Minimal z height before homing (G28) for Z clearance above the bed, clamps, ...
                              // Be sure you have this distance over your Z_MAX_POS in case.
 
 // Direction of endstops when homing; 1=MAX, -1=MIN