Remove HAS_BED_PROBE case in first raise in G28

Differentiating made sense here when we could save a dozen lines of code,
but not for one line.

Marlin/Marlin_main.cpp

@@ -2907,14 +2907,8 @@ inline void gcode_G28() {
           #endif
 
           feedrate = homing_feedrate[Z_AXIS];
-
-          #if HAS_BED_PROBE
-            do_blocking_move_to_z(z_dest);
-          #else
           line_to_z(z_dest);
           stepper.synchronize();
-          #endif
-
           destination[Z_AXIS] = current_position[Z_AXIS] = z_dest;
         }
       }