CubeCamera: Remove tone mapping related code. (#26435)

src/cameras/CubeCamera.js

@@ -1,4 +1,4 @@
-import { NoToneMapping, WebGLCoordinateSystem, WebGPUCoordinateSystem } from '../constants.js';
+import { WebGLCoordinateSystem, WebGPUCoordinateSystem } from '../constants.js';
 import { Object3D } from '../core/Object3D.js';
 import { PerspectiveCamera } from './PerspectiveCamera.js';
 
@@ -126,10 +126,8 @@ class CubeCamera extends Object3D {
 
 		const currentRenderTarget = renderer.getRenderTarget();
 
-		const currentToneMapping = renderer.toneMapping;
 		const currentXrEnabled = renderer.xr.enabled;
 
-		renderer.toneMapping = NoToneMapping;
 		renderer.xr.enabled = false;
 
 		const generateMipmaps = renderTarget.texture.generateMipmaps;
@@ -158,7 +156,6 @@ class CubeCamera extends Object3D {
 
 		renderer.setRenderTarget( currentRenderTarget );
 
-		renderer.toneMapping = currentToneMapping;
 		renderer.xr.enabled = currentXrEnabled;
 
 		renderTarget.texture.needsPMREMUpdate = true;