Delete unused dependencies (#556)

Author: winstliu

package-lock.json

@@ -140,7 +140,6 @@
         "test": "npm run compile:test && node ./out/test/runTest.js"
     },
     "devDependencies": {
-        "@types/fs-extra": "4.0.5",
         "@types/glob": "^7.2.0",
         "@types/html-to-text": "^5.1.2",
         "@types/mocha": "^9.0.0",
@@ -151,14 +150,11 @@
         "@typescript-eslint/eslint-plugin": "^6.11.0",
         "@typescript-eslint/parser": "^6.11.0",
         "@vscode/test-electron": "^1.6.2",
-        "ajv": "^6.9.1",
-        "assert": "1.4.1",
         "copy-webpack-plugin": "^10.2.0",
         "eslint": "^8.54.0",
         "glob": "^7.1.6",
         "mocha": "^9.1.1",
         "ts-loader": "^8.0.14",
-        "ts-node": "7.0.1",
         "typescript": "~5.2.2",
         "webpack": "^5.76.0",
         "webpack-cli": "^4.4.0"