improve code

packages/atlas/lib/src/lat_lng.dart

@@ -1,8 +1,7 @@
 /// A pair of latitude and longitude coordinates.
 /// The `latitude` and `longitude` are stored as degrees.
-import 'package:equatable/equatable.dart';
 
-class LatLng extends Equatable {
+class LatLng {
   /// The latitude in degrees between -90.0 and 90.0, both inclusive.
   final double latitude;
 
@@ -28,13 +27,4 @@ class LatLng extends Equatable {
 
   @override
   int get hashCode => latitude.hashCode ^ longitude.hashCode;
-
-  @override
-  List<Object?> get props => [
-        latitude,
-        longitude,
-      ];
-
-  @override
-  bool get stringify => true;
 }

packages/atlas/lib/src/polyline.dart

@@ -1,10 +1,9 @@
 import 'package:atlas/atlas.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
-import 'package:equatable/equatable.dart';
 
 /// A `Polyline` made up of multiple points on the map
-class Polyline extends Equatable {
+class Polyline {
   /// Uniquely identifies a `Polyline`.
   final String id;
 
@@ -83,36 +82,4 @@ class Polyline extends Equatable {
       return false;
     }
   }
-
-  @override
-  int get hashCode =>
-      id.hashCode ^
-      points.hashCode ^
-      onTap.hashCode ^
-      color.hashCode ^
-      width.hashCode ^
-      outlineColor.hashCode ^
-      isDottedLine.hashCode ^
-      outlineWidth.hashCode ^
-      intervals.hashCode ^
-      zIndex.hashCode ^
-      congestionLevel.hashCode;
-
-  @override
-  List<Object?> get props => [
-        id,
-        points,
-        onTap,
-        color,
-        width,
-        outlineColor,
-        isDottedLine,
-        outlineWidth,
-        intervals,
-        zIndex,
-        congestionLevel,
-      ];
-
-  @override
-  bool get stringify => true;
 }