OutputShader: Cleanup. (#26990)

* OutputShader: Cleanup.

* Update OutputShader.js

examples/jsm/shaders/OutputShader.js

@@ -1,7 +1,3 @@
-import {
-	ShaderChunk
-} from 'three';
-
 const OutputShader = {
 
 	uniforms: {
@@ -35,7 +31,8 @@ const OutputShader = {
 
 		uniform sampler2D tDiffuse;
 
-		` + ShaderChunk[ 'tonemapping_pars_fragment' ] + ShaderChunk[ 'colorspace_pars_fragment' ] + `
+		#include <tonemapping_pars_fragment>
+		#include <colorspace_pars_fragment>
 
 		varying vec2 vUv;