undoes accidental commit to pxtparts.d.ts
undoes accidental commit to pxtparts.d.ts

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