Remove unnecessary Alpine Linux repository and zlib installation

src/payment/app/build.gradle

@@ -85,8 +85,4 @@ dockerBuild {
 
 dockerBuildNative {
  images = ["phx.ocir.io/oraclelabs/micronaut-showcase/mushop/${project.parent.name}-${project.name}-native:$project.version"]
-}
-
-dockerfileNative {
- instruction "RUN echo 'http://dl-cdn.alpinelinux.org/alpine/v3.11/main' >> /etc/apk/repositories && apk update && apk add 'zlib<1.2.12'"
 }