WebGLRenderer: Removed unnecessary WebXR check.

src/renderers/WebGLRenderer.js

@@ -309,7 +309,7 @@ function WebGLRenderer( parameters ) {
 
 	// vr
 
-	var vr = ( typeof navigator !== 'undefined' && 'xr' in navigator && 'isSessionSupported' in navigator.xr ) ? new WebXRManager( _this, _gl ) : new WebVRManager( _this );
+	var vr = ( typeof navigator !== 'undefined' && 'xr' in navigator ) ? new WebXRManager( _this, _gl ) : new WebVRManager( _this );
 
 	this.vr = vr;