Unfudge test for $fh.get after $fh.seek on JVM

Author: usev6

S32-io/open.t

@@ -82,7 +82,6 @@ LEAVE unlink PATH;
     ok ?$fh.write('3'.encode), 'can use :update to write to file';
 
     $fh.seek(0, SeekFromBeginning);
-    #?rakudo.jvm todo 'got 4512345'
     is $fh.get, '12345', 'have used :update successfully';
 
     $fh.close;