去掉物理碰撞组件，英雄的移动改由系统逻辑统一处理

assets/resources/game/heros/mn2.prefab

@@ -62,13 +62,10 @@
       },
       {
         "__id__": 91
-      },
-      {
-        "__id__": 93
       }
     ],
     "_prefab": {
-      "__id__": 95
+      "__id__": 93
     },
     "_lpos": {
       "__type__": "cc.Vec3",
@@ -1352,40 +1349,6 @@
     "__type__": "cc.CompPrefabInfo",
     "fileId": "14OhXRCixNOaApgow/hFbp"
   },
-  {
-    "__type__": "cc.RigidBody2D",
-    "_name": "",
-    "_objFlags": 0,
-    "__editorExtras__": {},
-    "node": {
-      "__id__": 1
-    },
-    "_enabled": true,
-    "__prefab": {
-      "__id__": 86
-    },
-    "enabledContactListener": true,
-    "bullet": true,
-    "awakeOnLoad": true,
-    "_group": 4,
-    "_type": 1,
-    "_allowSleep": false,
-    "_gravityScale": 1,
-    "_linearDamping": 0,
-    "_angularDamping": 0,
-    "_linearVelocity": {
-      "__type__": "cc.Vec2",
-      "x": 0,
-      "y": 0
-    },
-    "_angularVelocity": 0,
-    "_fixedRotation": true,
-    "_id": ""
-  },
-  {
-    "__type__": "cc.CompPrefabInfo",
-    "fileId": "d8rVs6intBQ7lRU8Dw4zXV"
-  },
   {
     "__type__": "cc.BoxCollider2D",
     "_name": "",
@@ -1396,7 +1359,7 @@
     },
     "_enabled": true,
     "__prefab": {
-      "__id__": 88
+      "__id__": 86
     },
     "tag": 0,
     "_group": 4,
@@ -1430,7 +1393,7 @@
     },
     "_enabled": true,
     "__prefab": {
-      "__id__": 90
+      "__id__": 88
     },
     "anm": {
       "__id__": 22
@@ -1451,7 +1414,7 @@
     },
     "_enabled": true,
     "__prefab": {
-      "__id__": 92
+      "__id__": 90
     },
     "_id": ""
   },
@@ -1469,7 +1432,7 @@
     },
     "_enabled": true,
     "__prefab": {
-      "__id__": 94
+      "__id__": 92
     },
     "_id": ""
   },