[Elastic Agent] Don't log when upgrade capability doesn't apply (#25386)

* Fix #25302.

* Add changelog entry.

(cherry picked from commit 5a5fa15)

x-pack/elastic-agent/CHANGELOG.next.asciidoc

@@ -58,6 +58,8 @@
 - Remove FLEET_SERVER_POLICY_NAME env variable as it was not used {pull}25149[25149]
 - Passing in policy id to container command works {pull}25352[25352]
 - Reduce log level for listener cleanup to debug {pull}25274[25274]
+- Delay the restart of application when a status report of failure is given {pull}25339[25339]
+- Don't log when upgrade capability doesn't apply {pull}25386[25386]
 
 ==== New features
 

x-pack/elastic-agent/pkg/capabilities/upgrade.go

@@ -147,7 +147,6 @@ type multiUpgradeCapability struct {
 func (c *multiUpgradeCapability) Apply(in interface{}) (interface{}, error) {
 	upgradeMap := upgradeObject(in)
 	if upgradeMap == nil {
-		c.log.Warnf("expecting map config object but got nil for capability 'multi-upgrade'")
 		// not an upgrade we don't alter origin
 		return in, nil
 	}