revert 100% density pattern hack

In the fdmprinter definition the 'infill' is created by 999999 bottom layers to change to infill pattern to lines. This hack is reverted for ultimaker printers. More info: PP-25

resources/definitions/ultimaker.def.json

@@ -58,6 +58,12 @@
         },
         "meshfix_maximum_extrusion_area_deviation": {
             "value": "50000"
+        },
+        "top_layers": {
+            "value": "math.ceil(round(top_thickness / resolveOrValue('layer_height'), 4))"
+        },
+        "bottom_layers": {
+            "value": "math.ceil(round(bottom_thickness / resolveOrValue('layer_height'), 4))"
         }
     }
 }