Revert "Mark targetDomainObject as `@Nullable` in PermissionEvaluator"

This reverts commit 9f1381c382.

core/src/main/java/org/springframework/security/access/PermissionEvaluator.java

@@ -18,8 +18,6 @@ package org.springframework.security.access;
 
 import java.io.Serializable;
 
-import org.jspecify.annotations.Nullable;
-
 import org.springframework.aop.framework.AopInfrastructureBean;
 import org.springframework.security.core.Authentication;
 
@@ -41,7 +39,7 @@ public interface PermissionEvaluator extends AopInfrastructureBean {
 	 * expression system. Not null.
 	 * @return true if the permission is granted, false otherwise
 	 */
-	boolean hasPermission(Authentication authentication, @Nullable Object targetDomainObject, Object permission);
+	boolean hasPermission(Authentication authentication, Object targetDomainObject, Object permission);
 
 	/**
 	 * Alternative method for evaluating a permission where only the identifier of the

core/src/main/java/org/springframework/security/access/expression/DenyAllPermissionEvaluator.java

@@ -20,7 +20,6 @@ import java.io.Serializable;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.jspecify.annotations.Nullable;
 
 import org.springframework.core.log.LogMessage;
 import org.springframework.security.access.PermissionEvaluator;
@@ -41,7 +40,7 @@ public class DenyAllPermissionEvaluator implements PermissionEvaluator {
 	 * @return false always
 	 */
 	@Override
-	public boolean hasPermission(Authentication authentication, @Nullable Object target, Object permission) {
+	public boolean hasPermission(Authentication authentication, Object target, Object permission) {
 		this.logger.warn(LogMessage.format("Denying user %s permission '%s' on object %s", authentication.getName(),
 				permission, target));
 		return false;