[{_id:"694201337",/**_id => user id*/skills:[{sId:"420",/**sId => Skill id*/title:"Coding",level:69,goals:[{gId:"1337",/**gId => Goal id*/title:"3hr/week",text:"Code atleast 3 hours every week"},{gId:"12345",/**gId => Goal id*/title:"Simulation",text:"Create a python simulation game"}]}]}]

db.collection.update({_id:"694201337","skills.goals.gId":"1337"},{$pull:{"skills.$[].goals":{gId:"1337"}}})