diff --git a/resources/extruders/alfawise_u20.def.json b/resources/extruders/alfawise_u20.def.json
deleted file mode 100644
index f6dccce3ee..0000000000
--- a/resources/extruders/alfawise_u20.def.json
+++ /dev/null
@@ -1,96 +0,0 @@
-{
-    "name": "Alfawise U20",
-    "version": 2,
-    "inherits": "fdmprinter",
-    "metadata": {
-        "visible": true,
-        "author": "Samuel Pinches",
-        "manufacturer": "Alfawise",
-        "file_formats": "text/x-gcode",
-        "preferred_quality_type": "fine",
-        "machine_extruder_trains":
-        {
-            "0": "alfawise_u20_extruder_0"
-        }
-    },
-    "overrides": {
-        "machine_name": {
-            "default_value": "Alfawise U20"
-        },
-        "machine_start_gcode": {
-            "default_value": "; -- START GCODE --\nG21                     ;set units to millimetres\nG90                     ;set to absolute positioning\nM106 S0                 ;set fan speed to zero (turned off)\nG28 X0 Y0               ;move to the X/Y origin (Home)\nG28 Z0                  ;move to the Z origin (Home)\nG1 Z15.0 F6000          ;move Z to position 15.0 mm as fast as possible\nG92 E0                  ;zero the extruded length\nG1 X0.0 Y0.0 F1000.0    ;go to edge of print area\nG1 X60.0 E9.0 F1000.0   ;intro line\nG1 X100.0 E21.5 F1000.0 ;intro line\nG92 E0                  ;zero the extruded length again\n; -- end of START GCODE --"
-        },
-        "machine_end_gcode": {
-            "default_value": "; -- END GCODE --\nM104 S0                 ;turn off nozzle heater\nM140 S0                 ;turn off bed heater\nG91                     ;set to relative positioning\nG1 E-10 F300            ;retract the filament slightly\nG90                     ;set to absolute positioning\nG28 X0                  ;move to the X-axis origin (Home)\nG0 Y280 F600            ;bring the bed to the front for easy print removal\nM84                     ;turn off stepper motors\n; -- end of END GCODE --"
-        },
-        "machine_width": {
-            "default_value": 300
-        },
-        "machine_height": {
-            "default_value": 400
-        },
-        "machine_depth": {
-            "default_value": 300
-        },
-        "machine_heated_bed": {
-            "default_value": true
-        },
-        "machine_center_is_zero": {
-            "default_value": false
-        },
-        "gantry_height": {
-            "default_value": 10
-        },
-        "machine_gcode_flavor": {
-            "default_value": "RepRap (Marlin/Sprinter)"
-        },    
-        "material_diameter": {
-            "default_value": 1.75
-        },
-        "material_print_temperature": {
-            "default_value": 210
-        },
-        "material_bed_temperature": {
-            "default_value": 50
-        },
-        "layer_height": {
-            "default_value": 0.15
-        },
-        "layer_height_0": {
-            "default_value": 0.2
-        },
-        "wall_thickness": {
-            "default_value": 1.2
-        },
-        "speed_print": {
-            "default_value": 40
-        },
-        "speed_infill": {
-            "default_value": 40
-        },
-        "speed_wall": {
-            "default_value": 35
-        },
-        "speed_topbottom": {
-            "default_value": 35
-        },
-        "speed_travel": {
-            "default_value": 120
-        },
-        "speed_layer_0": {
-            "default_value": 20
-        },
-        "support_enable": {
-            "default_value": true
-        },
-                "retraction_enable": {
-            "default_value": true
-        },
-        "retraction_amount": {
-            "default_value": 5
-        },
-        "retraction_speed": {
-            "default_value": 45
-        }
-    }
-}
\ No newline at end of file