monaco: fix hover, removing parameter keyword
monaco: fix hover, removing parameter keyword

switchinnovations/pxt,playi/pxt,switch-education/pxt,switch-education/pxt,switch-education/pxt,switchinnovations/pxt,Microsoft/pxt,Microsoft/pxt,playi/pxt,switchinnovations/pxt,switchinnovations/pxt,playi/pxt,playi/pxt,Microsoft/pxt,switch-education/pxt,switch-education/pxt,Microsoft/pxt,Microsoft/pxt