Fix probeless delta build (#16537)

Marlin/src/inc/SanityCheck.h

     #error "ENABLE_LEVELING_FADE_HEIGHT on DELTA requires AUTO_BED_LEVELING_BILINEAR or AUTO_BED_LEVELING_UBL."
   #elif ENABLED(DELTA_AUTO_CALIBRATION) && !(HAS_BED_PROBE || HAS_LCD_MENU)
     #error "DELTA_AUTO_CALIBRATION requires a probe or LCD Controller."
+  #elif ENABLED(DELTA_CALIBRATION_MENU) && !HAS_LCD_MENU
+    #error "DELTA_CALIBRATION_MENU requires an LCD Controller."
   #elif ABL_GRID
     #if (GRID_MAX_POINTS_X & 1) == 0 || (GRID_MAX_POINTS_Y & 1) == 0
       #error "DELTA requires GRID_MAX_POINTS_X and GRID_MAX_POINTS_Y to be odd numbers."

Marlin/src/module/delta.cpp

  * Get a safe radius for calibration
  */
 
-#if ENABLED(DELTA_AUTO_CALIBRATION)
-  float calibration_radius_factor = 1;
-#endif
+#if EITHER(DELTA_AUTO_CALIBRATION, DELTA_CALIBRATION_MENU)
 
-float delta_calibration_radius() {
-  return FLOOR((DELTA_PRINTABLE_RADIUS - _MAX(HYPOT(probe_offset_xy.x, probe_offset_xy.y), MIN_PROBE_EDGE)) * calibration_radius_factor);
-}
+  #if ENABLED(DELTA_AUTO_CALIBRATION)
+    float calibration_radius_factor = 1;
+  #endif
+
+  float delta_calibration_radius() {
+    return calibration_radius_factor * (
+      #if HAS_BED_PROBE
+        FLOOR((DELTA_PRINTABLE_RADIUS) - _MAX(HYPOT(probe_offset_xy.x, probe_offset_xy.y), MIN_PROBE_EDGE))
+      #else
+        DELTA_PRINTABLE_RADIUS
+      #endif
+    );
+  }
+
+#endif
 
 /**
  * Delta Inverse Kinematics

Marlin/src/module/delta.h

   constexpr float calibration_radius_factor = 1;
 #endif
 
-float delta_calibration_radius();
+#if EITHER(DELTA_AUTO_CALIBRATION, DELTA_CALIBRATION_MENU)
+  float delta_calibration_radius();
+#endif
 
 /**
  * Delta Inverse Kinematics

buildroot/share/tests/megaatmega2560-tests

 exec_test $1 $2 "RAMPS | DELTA | OLED_PANEL_TINYBOY2 | UBL | Allen Key | EEPROM"
 
 #
+# Delta Config (generic) + Probeless
+#
+use_example_configs delta/generic
+opt_enable REPRAP_DISCOUNT_SMART_CONTROLLER DELTA_AUTO_CALIBRATION DELTA_CALIBRATION_MENU
+exec_test $1 $2 "RAMPS | DELTA | RRD LCD | DELTA_AUTO_CALIBRATION | DELTA_CALIBRATION_MENU"
+
+#
 # Delta Config (FLSUN AC because it's complex)
 #
 use_example_configs delta/FLSUN/auto_calibrate