Remove overrides of unused machine setting

Contributes to issue CURA-7328.

resources/definitions/ultimaker3.def.json

@@ -47,7 +47,6 @@
         "machine_depth": { "default_value": 215 },
         "machine_height": { "default_value": 200 },
         "machine_heated_bed": { "default_value": true },
-        "machine_filament_park_distance": { "value": "machine_heat_zone_length + 26.5" },
         "machine_nozzle_heat_up_speed": { "default_value": 1.4 },
         "machine_nozzle_cool_down_speed": { "default_value": 0.8 },
         "machine_head_with_fans_polygon":

resources/definitions/winbo_dragonl4.def.json

@@ -22,7 +22,6 @@
         "machine_height": { "default_value": 615 },
         "machine_heated_bed": { "default_value": true },
         "material_bed_temp_wait": { "default_value": false },
-        "machine_filament_park_distance": { "value": "machine_heat_zone_length" },
         "machine_nozzle_heat_up_speed": { "default_value": 1.4 },
         "machine_nozzle_cool_down_speed": { "default_value": 0.8 },
         "machine_head_with_fans_polygon":

resources/definitions/winbo_mini2.def.json

@@ -22,7 +22,6 @@
         "machine_height": { "default_value": 205 },
         "machine_heated_bed": { "default_value": false },
         "material_bed_temp_wait": { "default_value": false },
-        "machine_filament_park_distance": { "value": "machine_heat_zone_length" },
         "machine_nozzle_heat_up_speed": { "default_value": 1.4 },
         "machine_nozzle_cool_down_speed": { "default_value": 0.8 },
         "machine_head_with_fans_polygon":

resources/definitions/winbo_superhelper105.def.json

@@ -22,7 +22,6 @@
         "machine_height": { "default_value": 158 },
         "machine_heated_bed": { "default_value": false },
         "material_bed_temp_wait": { "default_value": false },
-        "machine_filament_park_distance": { "value": "machine_heat_zone_length" },
         "machine_nozzle_heat_up_speed": { "default_value": 1.4 },
         "machine_nozzle_cool_down_speed": { "default_value": 0.8 },
         "machine_head_with_fans_polygon":