[5.2] Cleanup of unused handlers

[jmartisk]

backport of #161

[quarkus-bot]

Status for workflow Build

This is the status report for running Build on commit 4a2a82e.

Failing Jobs

Status	Name	Step	Failures	Logs	Raw logs
✔️	Build - JDK 11			Logs	Raw logs
✖	Build - JDK 17	Build with Maven	Failures	Logs	Raw logs

Full information is available in the Build summary check run.

Failures

⚙️ Build - JDK 17 #

- Failing: servlet 
! Skipped: websocket websocket/core websocket/servlet and 1 more

📦 servlet

✖ io.undertow.servlet.test.dispatcher.DispatcherForwardTestCase.testPathBasedInclude line 137 - More details - Source on GitHub

org.junit.ComparisonFailure: expected:<...etContext/dispatch /[dispatch]> but was:<...etContext/dispatch /[forward]>
	at org.junit.Assert.assertEquals(Assert.java:117)
	at org.junit.Assert.assertEquals(Assert.java:146)
	at io.undertow.servlet.test.dispatcher.DispatcherForwardTestCase.testPathBasedInclude(DispatcherForwardTestCase.java:137)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)