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

Scripts/Editor/BarChartEditor.cs

@@ -9,13 +9,10 @@ namespace XCharts
     [CustomEditor(typeof(BarChart), false)]
     public class BarChartEditor : CoordinateChartEditor
     {
-        protected SerializedProperty m_Bar;
-
         protected override void OnEnable()
         {
             base.OnEnable();
             m_Target = (BarChart)target;
-            m_Bar = serializedObject.FindProperty("m_Bar");
         }
 
         protected override void OnEndInspectorGUI()
@@ -25,7 +22,6 @@ namespace XCharts
             {
                 return;
             }
-            EditorGUILayout.PropertyField(m_Bar, true);
         }
     }
 }