⚰️ Remove htmlunit version override

Spring 4 has the latest version and we'll let Spring manage this from
here on out.

Author: rmcdouga

spring/fluentforms-sample-webmvc-app/pom.xml

@@ -18,7 +18,6 @@
 		<java.version>17</java.version>
 		<wiremock.version>3.13.2</wiremock.version>
 		<wiremock-spring-boot.version>3.10.6</wiremock-spring-boot.version>
-		<htmlunit.version>4.16.0</htmlunit.version>
 		<fluentforms.spring.boot.starter.version>0.0.5-SNAPSHOT</fluentforms.spring.boot.starter.version>
 		<fp.hamcrest.matchers.version>0.0.4-SNAPSHOT</fp.hamcrest.matchers.version>
 	</properties>