[BUG] Java: unnecessary imports in generated files?

Description

OpenAPI Gradle plug-in (underlying generator) adds an unnecessary import:

import org.apache.cxf.jaxrs.ext.multipart.*;

when the Java configuration option "library" is set to "microprofile". Such imports are not needed - manually deleting them cause no compile errors.

openapi-generator version

5.0.0-SNAPSHOT

OpenAPI declaration file content or url

https://raw.githubusercontent.com/ory/kratos-client-java/master/api/openapi.yaml

Generation Details

I use the Gradle plugin, but I beleive the problem is in the core generator itself :

plugins {
    id 'org.openapi.generator'
}
openApiGenerate {
        generatorName = "java"
        inputSpec = "$rootDir/ory-kratos.yaml".toString() //get from the url above!
        outputDir = "$rootDir".toString()
        apiPackage = "kratos.api"
        invokerPackage = "kratos.invoker"
        modelPackage = "kratos.model"
        configOptions = [
                dateLibrary: "java8",
                java8: "true",
                library:"microprofile"
        ]
    }

Steps to reproduce

generate source code with the above configuration, see file kratos.api.AdminApi.java - the problematic import is there.

Related issues/PRs

Suggest a fix

Manually deleting the necessary import after each generation .

Start by reproducing generation with the supplied OpenAPI declaration, Gradle configuration, and library set to microprofile. Inspect the generated kratos.api.AdminApi.java and trace where its imports are produced. Done means the org.apache.cxf.jaxrs.ext.multipart.* import is no longer generated for this configuration without causing compilation errors.