message: Remove unused dependency
  jayschema is declared in package.json as a dependency, but is never used.
diff: "crc": "^3.2.1",
  "extend": "^2.0.0",
  "irc": "matrix-org/node-irc#b1614bc784200c65247784d7b9e9ab867140412d",
  - "jayschema": "^0.3.1",
  "js-yaml": "^3.2.7",
  "matrix-appservice-bridge": "1.4.0a",
  "nedb": "^1.1.2",
  