Remove net.sourceforge.nekohtml:nekohtml dependency

This dependency was being used by the deprecated spring-security-openid module, now that it is removed, we can also remove the dependency

Closes gh-13286

Author: marcusdacoregio

dependencies/spring-security-dependencies.gradle

@@ -38,7 +38,6 @@ dependencies {
 		api "jakarta.websocket:jakarta.websocket-client-api:2.1.0"
 		api "ldapsdk:ldapsdk:4.1"
 		api "net.sourceforge.htmlunit:htmlunit:2.66.0"
-		api "net.sourceforge.nekohtml:nekohtml:1.9.22"
 		api "org.apache.directory.server:apacheds-core-entry:1.5.5"
 		api "org.apache.directory.server:apacheds-core:1.5.5"
 		api "org.apache.directory.server:apacheds-protocol-ldap:1.5.5"