fixes analyzing issue

Author: maeddin

lib/src/animation_type_builder.dart

@@ -53,7 +53,6 @@ class _AnimationTypeHoverBuilderState<T, V>
     final values = widget.properties.values;
     final index1 = pos.floor();
     final index2 = pos.ceil();
-    final isListed = widget.properties.isCurrentListed;
     V listedValueFunction() => widget.lerp(
           widget.valueProvider(
               StyledToggleProperties(value: values[index1], index: index1)),

lib/src/animations.dart

@@ -3,7 +3,7 @@ part of 'package:animated_toggle_switch/animated_toggle_switch.dart';
 /// This class is a proxy for another animation.
 ///
 /// It is used for passing animations in builders without exposing the real
-/// animation to users.
+/// animation to the user.
 class _PrivateAnimation<T> extends Animation<T> {
   final Animation<T> _parent;