Examples: Clean up. (#27856)

examples/jsm/postprocessing/SAOPass.js

@@ -81,7 +81,6 @@ class SAOPass extends Pass {
 			vertexShader: SAOShader.vertexShader,
 			uniforms: UniformsUtils.clone( SAOShader.uniforms )
 		} );
-		this.saoMaterial.extensions.derivatives = true;
 		this.saoMaterial.defines[ 'PERSPECTIVE_CAMERA' ] = this.camera.isPerspectiveCamera ? 1 : 0;
 		this.saoMaterial.uniforms[ 'tDepth' ].value = depthTexture;
 		this.saoMaterial.uniforms[ 'tNormal' ].value = this.normalRenderTarget.texture;

examples/jsm/renderers/webgl-legacy/nodes/GLSL1NodeBuilder.js

@@ -40,8 +40,6 @@ class GLSL1NodeBuilder extends NodeBuilder {
 
 	getTextureBias( texture, textureProperty, uvSnippet, biasSnippet ) {
 
-		if ( this.material.extensions !== undefined ) this.material.extensions.shaderTextureLOD = true;
-
 		return `textureLod( ${textureProperty}, ${uvSnippet}, ${biasSnippet} )`;
 
 	}

examples/jsm/renderers/webgl-legacy/nodes/WebGLNodeBuilder.js

@@ -433,8 +433,6 @@ class WebGLNodeBuilder extends NodeBuilder {
 
 	generateTextureLevel( texture, textureProperty, uvSnippet, biasSnippet ) {
 
-		if ( this.material.extensions !== undefined ) this.material.extensions.shaderTextureLOD = true;
-
 		return `textureLod( ${textureProperty}, ${uvSnippet}, ${biasSnippet} )`;
 
 	}

examples/webgl_gpgpu_protoplanet.html

@@ -405,8 +405,6 @@
 					fragmentShader: document.getElementById( 'particleFragmentShader' ).textContent
 				} );
 
-				material.extensions.drawBuffers = true;
-
 				const particles = new THREE.Points( geometry, material );
 				particles.matrixAutoUpdate = false;
 				particles.updateMatrix();

examples/webgl_materials_subsurface_scattering.html

@@ -123,7 +123,6 @@
 				fragmentShader: shader.fragmentShader,
 				lights: true
 			} );
-			material.extensions.derivatives = true;
 
 			// LOADER