Remove useless code (#15670)

* remove unused data

* refine

cocos/2d/renderer/render-data.ts

@@ -256,7 +256,7 @@ export class RenderData extends BaseRenderData {
         this.syncRender2dBuffer();
     }
 
-    get data ():IRenderData[] {
+    get data (): IRenderData[] {
         return this._data;
     }
 
@@ -304,10 +304,6 @@ export class RenderData extends BaseRenderData {
     public hashDirty = true;
 
     private _data: IRenderData[] = [];
-    private _pivotX = 0;
-    private _pivotY = 0;
-    private _width = 0;
-    private _height = 0;
     private _frame: SpriteFrame | TextureBase | null = null;
     protected _accessor: StaticVBAccessor = null!;
     get accessor (): StaticVBAccessor { return this._accessor; }
@@ -495,26 +491,9 @@ export class RenderData extends BaseRenderData {
         }
     }
 
-    public updateSizeNPivot (width: number, height: number, pivotX: number, pivotY: number): void {
-        if (width !== this._width
-            || height !== this._height
-            || pivotX !== this._pivotX
-            || pivotY !== this._pivotY) {
-            this._width = width;
-            this._height = height;
-            this._pivotX = pivotX;
-            this._pivotY = pivotY;
-            this.vertDirty = true;
-        }
-    }
-
     public clear (): void {
         this.resize(0, 0);
         this._data.length = 0;
-        this._pivotX = 0;
-        this._pivotY = 0;
-        this._width = 0;
-        this._height = 0;
         this.indices = null;
         this.vertDirty = true;
         this.material = null;
@@ -810,5 +789,3 @@ export class MeshRenderData extends BaseRenderData {
         }
     }
 }
-
-const _meshDataPool: RecyclePool<MeshRenderData> = new RecyclePool(() => new MeshRenderData(), 32);