remove envMap encoding macro.

src/renderers/shaders/ShaderChunk/envmap_pars_fragment.glsl

@@ -11,12 +11,6 @@
 	#endif
 	uniform float flipEnvMap;
 
-	vec4 envMapTexelToLinear( vec4 value ) {
-		#define MACRO_DECODE ENVMAP_ENCODING
-			#include <encoding_template>
-		#undef MACRO_DECODE
-	}
-
 	#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG ) || defined( STANDARD )
 
 		uniform float refractionRatio;