Update README.md

Author: wasabeef

README.md

@@ -739,28 +739,18 @@ flutter_gen:
     # - snake-case
     # - dot-delimiter
     style: dot-delimiter
-    # Optional
-    outputs:
-      # Default is Assets
-      class_name: MyAssets
     
   fonts:
     # Optional
     enabled: true
     # Optional
-    outputs:
-      # Default is FontFamily
-      class_name: MyFontFamily
 
   colors:
     # Optional
     enabled: true
     # Optional
     inputs: []
     # Optional
-    outputs:
-      # Default is ColorName
-      class_name: MyColorName 
 
 flutter:
   # See: https://flutter.dev/docs/development/ui/assets-and-images#specifying-assets