Remove TODO comment

Author: aherbert

commons-rng-simple/src/test/java/org/apache/commons/rng/simple/ProvidersCommonParametricTest.java

@@ -374,7 +374,6 @@ void testSupportedInterfaces(ProvidersList.Data data) {
     //   * checkNextIntegerInRange
     //   * checkNextInRange
     // have been copied from "src/test" in module "commons-rng-core".
-    // TODO: check whether it is possible to have a single implementation.
 
     /**
      * Populates a list with random numbers.