Murder; Revising the elements that constitute murder in the first degree and murder in the second degree; revising the elements that constitute felony murder, for murder in the second degree; deleting provisions relating to felony murder, for murder in the third degree; authorizing a person convicted under certain murder provisions to file a petition with the sentencing court to have his or her murder conviction vacated or to be resentenced, as applicable, on or after a specified date, etc.