Remove unused class-transformer (#18)

Author: huntharo

package-lock.json

@@ -50,7 +50,6 @@
   "dependencies": {
     "@aws-sdk/client-dynamodb": "^3.20.0",
     "@aws-sdk/lib-dynamodb": "^3.20.0",
-    "class-transformer": "~0.4.0",
     "debug": "^4.3.4"
   },
   "devDependencies": {