Removed default value to resolve php 8.0 deprecation error

[nilesh-axelerant]

While updating the PHP version from 7.3 to 8.0 below errors were generated.

PHP Deprecated: Required parameter $contextHelper follows optional parameter $table in /var/www/html/web/modules/contrib/purl/src/Routing/PurlRouteProvider.php on line 114
Deprecated: Required parameter $contextHelper follows optional parameter $table in /var/www/html/web/modules/contrib/purl/src/Routing/PurlRouteProvider.php on line 114
PHP Deprecated: Required parameter $matchedModifiers follows optional parameter $table in /var/www/html/web/modules/contrib/purl/src/Routing/PurlRouteProvider.php on line 114
Deprecated: Required parameter $matchedModifiers follows optional parameter $table in /var/www/html/web/modules/contrib/purl/src/Routing/PurlRouteProvider.php on line 114

Raised PR to resolve the above warnings.

[rbran100]

@freelock Can we get this merged in? Any changes you would like to see? I am happy to help manage these if you want as well.