Cleanup examples (#27039)

* Cleanup example

The extra argument does nothing.

* Update webgl_materials_envmaps_hdr.html

* Update webgl_materials_physical_transmission_alpha.html

examples/webgl_materials_envmaps_exr.html

@@ -128,7 +128,7 @@
 				gui.add( params, 'roughness', 0, 1, 0.01 );
 				gui.add( params, 'metalness', 0, 1, 0.01 );
 				gui.add( params, 'exposure', 0, 2, 0.01 );
-				gui.add( params, 'debug', false );
+				gui.add( params, 'debug' );
 				gui.open();
 
 			}

examples/webgl_materials_envmaps_hdr.html

@@ -152,7 +152,7 @@
 				gui.add( params, 'roughness', 0, 1, 0.01 );
 				gui.add( params, 'metalness', 0, 1, 0.01 );
 				gui.add( params, 'exposure', 0, 2, 0.01 );
-				gui.add( params, 'debug', false );
+				gui.add( params, 'debug' );
 				gui.open();
 
 			}

examples/webgl_materials_physical_transmission_alpha.html

@@ -114,7 +114,6 @@
 
 									params.ior = mesh.material.ior;
 									params.specularIntensity = mesh.material.specularIntensity;
-									params.emissiveIntensity = mesh.material.emissiveIntensity;
 
 									params.transmission = mesh.material.transmission;
 									params.thickness = mesh.material.thickness;