Remove obsolete dependency on picocli

The dependency on picocli was removed from the code in commit 019785a72e.

This commit removes the dependency management from the build.

See gh-28825

framework-platform/framework-platform.gradle

@@ -45,7 +45,6 @@ dependencies {
 		api("com.thoughtworks.xstream:xstream:1.4.20")
 		api("commons-io:commons-io:2.11.0")
 		api("de.bechte.junit:junit-hierarchicalcontextrunner:4.12.2")
-		api("info.picocli:picocli:4.7.4")
 		api("io.micrometer:context-propagation:1.0.4")
 		api("io.mockk:mockk:1.13.4")
 		api("io.projectreactor.netty:reactor-netty5-http:2.0.0-M3")

spring-test/spring-test.gradle

@@ -15,7 +15,6 @@ dependencies {
 	optional(project(":spring-webmvc"))
 	optional(project(":spring-websocket"))
 	optional("com.jayway.jsonpath:json-path")
-	optional("info.picocli:picocli")
 	optional("io.micrometer:context-propagation")
 	optional("io.micrometer:micrometer-observation")
 	optional("io.projectreactor:reactor-test")