remove the encoder

Author: sebsto

Examples/HelloJSON/README.md

@@ -2,6 +2,8 @@
 
 This is a simple example of an AWS Lambda function that takes a JSON structure as input parameter and returns a JSON structure as response.
 
+The runtime takes care of decoding the input and encoding the output.
+
 ## Code 
 
 The code defines a `HelloRequest` and `HelloResponse` data structure to represent the input and outpout payload. These structures are typically shared with a client project, such as an iOS application.

Examples/HelloJSON/Sources/main.swift

@@ -28,10 +28,6 @@ struct HelloResponse: Encodable {
     let greetings: String
 }
 
-// the JSON encoder. It is created outside of the handler.
-// this instance is reused at each invocation.
-let encoder = JSONEncoder()
-
 // the Lambda runtime
 let runtime = LambdaRuntime {
     (event: HelloRequest, context: LambdaContext) in