message: remove the snippet of \setminus
diff: "body": "\\Big|",
  "description": "Insert a Big |"
  },
  - "setminus": {
  - "prefix": "@\\",
  - "body": "\\setminus",
  - "description": "Insert a minus set"
  - },
  "bigcup": {
  "prefix": "@+",
  "body": "\\bigcup",
  