Remove superfluous newlines as per PHPCBF

exceptions/updates/MDInvalidLicense.php

@@ -13,7 +13,6 @@
  * accepted by museum-digital.
  */
 final class MDInvalidLicense extends MDgenericInvalidInputsException {
-
     /**
      * Error message.
      *
@@ -25,5 +24,4 @@ public function errorMessage() {
         return $errorMsg;
 
     }
-
 }