WebGLProgram: Reverted RawShaderMaterial SHADER_NAME. See #9120.

src/renderers/webgl/WebGLProgram.js

@@ -284,16 +284,12 @@ THREE.WebGLProgram = ( function () {
 
 			prefixVertex = [
 
-				'#define SHADER_NAME RawShaderMaterial',
-
 				customDefines
 
 			].filter( filterEmptyLine ).join( '\n' );
 
 			prefixFragment = [
 
-				'#define SHADER_NAME RawShaderMaterial',
-
 				customDefines
 
 			].filter( filterEmptyLine ).join( '\n' );