remove hdrPisa images and update webgl_tonemapping to use the pisaHDR images instead. (#9140)

examples/webgl_tonemapping.html

@@ -160,7 +160,7 @@
 				scene.add( mesh );
 
 				// Materials
-				var hdrpath = "../examples/textures/cube/hdrPisa/";
+				var hdrpath = "../examples/textures/cube/pisaHDR/";
 				var hdrformat = '.hdr';
 				var hdrurls = [
 					hdrpath + 'px' + hdrformat, hdrpath + 'nx' + hdrformat,