Fix compile with DISTINCT_E_FACTORS + SLIM_LCD_MENUS (#21733)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/lcd/menu/menu_advanced.cpp

 
 #if DISABLED(SLIM_LCD_MENUS)
 
-  #if ENABLED(DISTINCT_E_FACTORS)
-    inline void _reset_e_acceleration_rate(const uint8_t e) { if (e == active_extruder) planner.reset_acceleration_rates(); }
-    inline void _planner_refresh_e_positioning(const uint8_t e) {
-      if (e == active_extruder)
-        planner.refresh_positioning();
-      else
-        planner.steps_to_mm[E_AXIS_N(e)] = 1.0f / planner.settings.axis_steps_per_mm[E_AXIS_N(e)];
-    }
-  #endif
-
   // M203 / M205 Velocity options
   void menu_advanced_velocity() {
     // M203 Max Feedrate
     #if ENABLED(DISTINCT_E_FACTORS)
       EDIT_ITEM_FAST(long5_25, MSG_AMAX_E, &planner.settings.max_acceleration_mm_per_s2[E_AXIS_N(active_extruder)], 100, max_accel_edit_scaled.e, []{ planner.reset_acceleration_rates(); });
       LOOP_L_N(n, E_STEPPERS)
-        EDIT_ITEM_FAST_N(long5_25, n, MSG_AMAX_EN, &planner.settings.max_acceleration_mm_per_s2[E_AXIS_N(n)], 100, max_accel_edit_scaled.e, []{ _reset_e_acceleration_rate(MenuItemBase::itemIndex); });
+        EDIT_ITEM_FAST_N(long5_25, n, MSG_AMAX_EN, &planner.settings.max_acceleration_mm_per_s2[E_AXIS_N(n)], 100, max_accel_edit_scaled.e, []{
+          if (MenuItemBase::itemIndex == active_extruder)
+            planner.reset_acceleration_rates();
+       });
     #elif E_STEPPERS
       EDIT_ITEM_FAST(long5_25, MSG_AMAX_E, &planner.settings.max_acceleration_mm_per_s2[E_AXIS], 100, max_accel_edit_scaled.e, []{ planner.reset_acceleration_rates(); });
     #endif
 
   #if ENABLED(DISTINCT_E_FACTORS)
     LOOP_L_N(n, E_STEPPERS)
-      EDIT_ITEM_FAST_N(float51, n, MSG_EN_STEPS, &planner.settings.axis_steps_per_mm[E_AXIS_N(n)], 5, 9999, []{ _planner_refresh_e_positioning(MenuItemBase::itemIndex); });
+      EDIT_ITEM_FAST_N(float51, n, MSG_EN_STEPS, &planner.settings.axis_steps_per_mm[E_AXIS_N(n)], 5, 9999, []{
+        const uint8_t e = MenuItemBase::itemIndex;
+        if (e == active_extruder)
+          planner.refresh_positioning();
+        else
+          planner.steps_to_mm[E_AXIS_N(e)] = 1.0f / planner.settings.axis_steps_per_mm[E_AXIS_N(e)];
+      });
   #elif E_STEPPERS
     EDIT_ITEM_FAST(float51, MSG_E_STEPS, &planner.settings.axis_steps_per_mm[E_AXIS], 5, 9999, []{ planner.refresh_positioning(); });
   #endif