Remove Sketch machine for Cura 5.8 release.

PP-333

resources/quality/ultimaker_sketch/um_sketch_global_Draft_Quality.inst.cfg

@@ -1,15 +0,0 @@
-[general]
-definition = ultimaker_sketch
-name = Fast
-version = 4
-
-[metadata]
-global_quality = True
-quality_type = draft
-setting_version = 23
-type = quality
-weight = -2
-
-[values]
-layer_height = 0.2
-