Gratkit Filament Dryer: remove branding from top level name

PR #1418
Could be made into a climate entity, but not sure if that would be appropriate, as the current temperature measurement may not be directly related to the temperature setting.

custom_components/tuya_local/devices/gratkit_filament_dryer.yaml

@@ -1,4 +1,4 @@
-name: GratKit filament dryer
+name: Filament dryer
 products:
   - id: mxct11k2jqpak13a
     name: GratKit Firefly Smart Dryer Box