Remove deprecated HTTP configuration

[gastaldi]

This removes configuration deprecated in 626c339

[quarkus-bot]

Failing Jobs - Building e722a54

Status	Name	Step	Failures	Logs	Raw logs
✔️	JVM Tests - JDK 11
✖	JVM Tests - JDK 17	Build	Failures	Logs	Raw logs

Full information is available in the Build summary check run.

Failures

⚙️ JVM Tests - JDK 17 #

- Failing: extensions/smallrye-reactive-messaging-kafka/deployment 
! Skipped: integration-tests/kafka-oauth-keycloak integration-tests/kafka-sasl-elytron integration-tests/kubernetes/quarkus-standard-way-kafka and 3 more

📦 extensions/smallrye-reactive-messaging-kafka/deployment

✖ io.quarkus.smallrye.reactivemessaging.kafka.deployment.testing.KafkaDevServicesContinuousTestingTestCase.testContinuousTestingScenario2 line 88 - More details - Source on GitHub

org.opentest4j.AssertionFailedError: expected: <1> but was: <0>
	at org.junit.jupiter.api.AssertionUtils.fail(AssertionUtils.java:55)
	at org.junit.jupiter.api.AssertionUtils.failNotEqual(AssertionUtils.java:62)