重构LineChart和BarChart，移除Line和Bar组件，参数统一放到Serie中配置。

Scripts/Editor/LineChartEditor.cs

@@ -9,19 +9,10 @@ namespace XCharts
     [CustomEditor(typeof(LineChart), false)]
     public class LineChartEditor : CoordinateChartEditor
     {
-        protected SerializedProperty m_Line;
-
         protected override void OnEnable()
         {
             base.OnEnable();
             m_Target = (LineChart)target;
-            m_Line = serializedObject.FindProperty("m_Line");
-        }
-
-        protected override void OnEndInspectorGUI()
-        {
-            base.OnEndInspectorGUI();
-            EditorGUILayout.PropertyField(m_Line, true);
         }
     }
 }