[2109] uncomment some dead code

that got committed by accident and should not have been disabled

src/lib/datasrc/tests/faked_nsec3.cc

@@ -156,7 +156,6 @@ performNSEC3Test(ZoneFinder &finder, bool rrsigs_exist) {
                        finder.findNSEC3(origin, false));
     }
 
-/*
     // Recursive mode doesn't change the result in this case.
     {
         SCOPED_TRACE("apex, recursive mode");
@@ -212,7 +211,6 @@ performNSEC3Test(ZoneFinder &finder, bool rrsigs_exist) {
                        zzz_nsec3_text, "",
                        finder.findNSEC3(largest_name, false));
     }
-*/
 }
 
 }