ShaderChunks: Remove obsolete comment. (#24608)

src/renderers/shaders/ShaderLib/vsm.glsl.js

@@ -20,9 +20,6 @@ void main() {
 	float mean = 0.0;
 	float squared_mean = 0.0;
 
-	// This seems totally useless but it's a crazy work around for a Adreno compiler bug
-	// float depth = unpackRGBAToDepth( texture2D( shadow_pass, ( gl_FragCoord.xy ) / resolution ) );
-
 	float uvStride = samples <= 1.0 ? 0.0 : 2.0 / ( samples - 1.0 );
 	float uvStart = samples <= 1.0 ? 0.0 : - 1.0;
 	for ( float i = 0.0; i < samples; i ++ ) {