Polish

- Backport main

(cherry picked from commit 891e1e1)

Author: jvalkeal

spring-shell-core/src/main/java/org/springframework/shell/command/invocation/InvocableShellMethod.java

@@ -44,7 +44,6 @@
 import org.springframework.messaging.Message;
 import org.springframework.messaging.handler.invocation.HandlerMethodArgumentResolver;
 import org.springframework.shell.ParameterValidationException;
-import org.springframework.shell.Utils;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
 import org.springframework.util.ObjectUtils;