message: remove useless bigl commands.
diff: "package": "latex-mathsymbols",
  "snippet": "Biggl"
  },
  - "Biggl..\\Biggr": {
  - "command": "Biggl..\\Biggr",
  - "package": "latex-mathsymbols",
  - "snippet": "Biggl..\\Biggr"
  - },
  "biggl": {
  "command": "biggl",
  "package": "latex-mathsymbols",
  "snippet": "biggl"
  },
  - "biggl..\\biggr": {
  - "command": "biggl..\\biggr",
  - "package": "latex-mathsymbols",
  - "snippet": "biggl..\\biggr"
  - },
  "Biggm": {
  "command": "Biggm",
  "package": "latex-mathsymbols",
  "package": "latex-mathsymbols",
  "snippet": "Bigl"
  },
  - "Bigl..\\Bigr": {
  - "command": "Bigl..\\Bigr",
  - "package": "latex-mathsymbols",
  - "snippet": "Bigl..\\Bigr"
  - },
  "bigl": {
  "command": "bigl",
  "package": "latex-mathsymbols",
  "snippet": "bigl"
  },
  - "bigl..\\bigr": {
  - "command": "bigl..\\bigr",
  - "package": "latex-mathsymbols",
  - "snippet": "bigl..\\bigr"
  - },
  "Bigm": {
  "command": "Bigm",
  "package": "latex-mathsymbols",
  