Drop extra initializers for vars initialized by EEPROM code

Marlin/Marlin_main.cpp

 int16_t feedrate_percentage = 100, saved_feedrate_percentage,
     flow_percentage[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(100);
 
+// Initialized by settings.load()
 bool axis_relative_modes[] = AXIS_RELATIVE_MODES,
-     volumetric_enabled =
-        #if ENABLED(VOLUMETRIC_DEFAULT_ON)
-          true
-        #else
-          false
-        #endif
-      ;
-float filament_size[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(DEFAULT_NOMINAL_FILAMENT_DIA),
-      volumetric_multiplier[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(1.0);
+     volumetric_enabled;
+float filament_size[EXTRUDERS], volumetric_multiplier[EXTRUDERS];
 
 #if HAS_WORKSPACE_OFFSET
   #if HAS_POSITION_SHIFT
 static uint8_t target_extruder;
 
 #if HAS_BED_PROBE
-  float zprobe_zoffset = Z_PROBE_OFFSET_FROM_EXTRUDER;
+  float zprobe_zoffset; // Initialized by settings.load()
 #endif
 
 #if HAS_ABL
 #endif
 
 #if ENABLED(Z_DUAL_ENDSTOPS)
-  float z_endstop_adj =
-    #ifdef Z_DUAL_ENDSTOPS_ADJUSTMENT
-      Z_DUAL_ENDSTOPS_ADJUSTMENT
-    #else
-      0
-    #endif
-  ;
+  float z_endstop_adj;
 #endif
 
 // Extruder offsets
 #if HOTENDS > 1
-  float hotend_offset[XYZ][HOTENDS];
+  float hotend_offset[XYZ][HOTENDS]; // Initialized by settings.load()
 #endif
 
 #if HAS_Z_SERVO_ENDSTOP
   float delta[ABC],
         endstop_adj[ABC] = { 0 };
 
-  // These values are loaded or reset at boot time when setup() calls
-  // settings.load(), which calls recalc_delta_settings().
+  // Initialized by settings.load()
   float delta_radius,
         delta_tower_angle_trim[2],
         delta_tower[ABC][2],

Marlin/endstops.cpp

 
 // public:
 
-bool  Endstops::enabled = true,
-      Endstops::enabled_globally =
-        #if ENABLED(ENDSTOPS_ALWAYS_ON_DEFAULT)
-          (true)
-        #else
-          (false)
-        #endif
-      ;
+bool Endstops::enabled, Endstops::enabled_globally; // Initialized by settings.load()
 volatile char Endstops::endstop_hit_bits; // use X_MIN, Y_MIN, Z_MIN and Z_MIN_PROBE as BIT value
 
 #if ENABLED(Z_DUAL_ENDSTOPS)

Marlin/planner.cpp

          Planner::max_acceleration_mm_per_s2[XYZE_N]; // Use M201 to override by software
 
 millis_t Planner::min_segment_time;
+
+// Initialized by settings.load()
 float Planner::min_feedrate_mm_s,
       Planner::acceleration,         // Normal acceleration mm/s^2  DEFAULT ACCELERATION for all printing moves. M204 SXXXX
       Planner::retract_acceleration, // Retract acceleration mm/s^2 filament pull-back and push-forward while standing still in the other axes M204 TXXXX
 #endif
 
 #if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
-  float Planner::z_fade_height,
+  float Planner::z_fade_height, // Initialized by settings.load()
         Planner::inverse_z_fade_height;
 #endif
 
 #endif
 
 #if ENABLED(LIN_ADVANCE)
-  float Planner::extruder_advance_k = LIN_ADVANCE_K,
-        Planner::advance_ed_ratio = LIN_ADVANCE_E_D_RATIO,
+  float Planner::extruder_advance_k, // Initialized by settings.load()
+        Planner::advance_ed_ratio,   // Initialized by settings.load()
         Planner::position_float[NUM_AXIS] = { 0 };
 #endif
 

Marlin/stepper.cpp

 #endif
 
 #if HAS_MOTOR_CURRENT_PWM
-  uint32_t Stepper::motor_current_setting[3] = PWM_MOTOR_CURRENT;
+  uint32_t Stepper::motor_current_setting[3]; // Initialized by settings.load()
 #endif
 
 // private:

Marlin/temperature.cpp

   int16_t Temperature::target_temperature_bed = 0;
 #endif
 
+// Initialized by settings.load()
 #if ENABLED(PIDTEMP)
   #if ENABLED(PID_PARAMS_PER_HOTEND) && HOTENDS > 1
-    float Temperature::Kp[HOTENDS] = ARRAY_BY_HOTENDS1(DEFAULT_Kp),
-          Temperature::Ki[HOTENDS] = ARRAY_BY_HOTENDS1((DEFAULT_Ki) * (PID_dT)),
-          Temperature::Kd[HOTENDS] = ARRAY_BY_HOTENDS1((DEFAULT_Kd) / (PID_dT));
+    float Temperature::Kp[HOTENDS], Temperature::Ki[HOTENDS], Temperature::Kd[HOTENDS];
     #if ENABLED(PID_EXTRUSION_SCALING)
-      float Temperature::Kc[HOTENDS] = ARRAY_BY_HOTENDS1(DEFAULT_Kc);
+      float Temperature::Kc[HOTENDS];
     #endif
   #else
-    float Temperature::Kp = DEFAULT_Kp,
-          Temperature::Ki = (DEFAULT_Ki) * (PID_dT),
-          Temperature::Kd = (DEFAULT_Kd) / (PID_dT);
+    float Temperature::Kp, Temperature::Ki, Temperature::Kd;
     #if ENABLED(PID_EXTRUSION_SCALING)
-      float Temperature::Kc = DEFAULT_Kc;
+      float Temperature::Kc;
     #endif
   #endif
 #endif
 
+// Initialized by settings.load()
 #if ENABLED(PIDTEMPBED)
-  float Temperature::bedKp = DEFAULT_bedKp,
-        Temperature::bedKi = ((DEFAULT_bedKi) * PID_dT),
-        Temperature::bedKd = ((DEFAULT_bedKd) / PID_dT);
+  float Temperature::bedKp, Temperature::bedKi, Temperature::bedKd;
 #endif
 
 #if ENABLED(BABYSTEPPING)

Marlin/ultralcd.cpp

   bool ubl_lcd_map_control = false;
 #endif
 
+// Initialized by settings.load()
 int16_t lcd_preheat_hotend_temp[2], lcd_preheat_bed_temp[2], lcd_preheat_fan_speed[2];
 
 #if ENABLED(FILAMENT_LCD_DISPLAY) && ENABLED(SDSUPPORT)

Marlin/ultralcd_impl_DOGM.h

 
 #include "utf_mapper.h"
 
-uint16_t lcd_contrast;
+uint16_t lcd_contrast; // Initialized by settings.load()
 static char currentfont = 0;
 
 // The current graphical page being rendered