refactor(hero): 移除英雄等级显示相关逻辑

1. 从HeroTopBarComp中移除等级Label组件、lvShow方法以及等级显示调用
2. 从HeroViewComp的update逻辑中移除等级脏数据监听
3. 调整英雄顶栏预制体的布局参数并隐藏等级节点

assets/resources/game/heros/top.prefab

@@ -98,7 +98,7 @@
     },
     "_lpos": {
       "__type__": "cc.Vec3",
-      "x": 9.114,
+      "x": 0,
       "y": 10,
       "z": 0
     },
@@ -220,7 +220,7 @@
         "__id__": 17
       }
     ],
-    "_active": false,
+    "_active": true,
     "_components": [
       {
         "__id__": 25
@@ -238,7 +238,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": -9.738,
+      "y": -7.84,
       "z": 0
     },
     "_lrot": {
@@ -290,7 +290,7 @@
     },
     "_lpos": {
       "__type__": "cc.Vec3",
-      "x": -35,
+      "x": -20,
       "y": 0,
       "z": 0
     },
@@ -331,8 +331,8 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 70,
-      "height": 10
+      "width": 40,
+      "height": 5
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -509,8 +509,8 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 240,
-      "height": 40
+      "width": 140,
+      "height": 23.333333333333336
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -634,8 +634,8 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 70,
-      "height": 10
+      "width": 40,
+      "height": 5
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -862,7 +862,7 @@
     "_contentSize": {
       "__type__": "cc.Size",
       "width": 40,
-      "height": 11
+      "height": 9
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -1040,7 +1040,7 @@
     "_contentSize": {
       "__type__": "cc.Size",
       "width": 140,
-      "height": 43.333333333333336
+      "height": 36.66666666666667
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -1165,7 +1165,7 @@
     "_contentSize": {
       "__type__": "cc.Size",
       "width": 40,
-      "height": 11
+      "height": 9
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -1392,7 +1392,7 @@
     "_contentSize": {
       "__type__": "cc.Size",
       "width": 40,
-      "height": 11
+      "height": 9
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -1695,7 +1695,7 @@
     "_contentSize": {
       "__type__": "cc.Size",
       "width": 40,
-      "height": 11
+      "height": 9
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -2541,7 +2541,6 @@
     "__type__": "c4181/FEWhKbY0D0PLdCyKi",
     "_name": "",
     "_objFlags": 0,
-    "__editorExtras__": {},
     "node": {
       "__id__": 1
     },
@@ -2559,7 +2558,7 @@
     "hpBarSprite": {
       "__id__": 36
     },
-    "_id": ""
+    "_id": "a77QVRkP5NX4b+LyqmW1KJ"
   },
   {
     "__type__": "cc.CompPrefabInfo",