Remove unused code

[sebsto]

Expected behavior

trap and Signal is not used anymore

https://github.com/swift-server/swift-aws-lambda-runtime/blob/c22f5271a06ed41b31764691c213b8f40260332a/Sources/AWSLambdaRuntimeCore/Utils.swift#L40

Actual behavior

n/a

Steps to reproduce

n/a

If possible, minimal yet complete reproducer code (or URL to code)

No response

What version of this project (swift-aws-lambda-runtime) are you using?

main

Swift version

all

Amazon Linux 2 docker image version

all

[sebsto]

Fix with 4a7d95e