get rid of some regex modifier tests that are (intentionally) no longer supported
get rid of some regex modifier tests that are (intentionally) no longer supported

cygx/nqp,cygx/nqp,cygx/nqp,cygx/nqp,cygx/nqp,cygx/nqp,cygx/nqp,perl6/nqp-rx,perl6/nqp-rx,cygx/nqp