[Ingest Manager] Remove fleet admin from setup script (elastic#18611)

* removed unnecessary fleet admin

* change

dev-tools/packaging/templates/docker/docker-entrypoint.elastic-agent.tmpl

@@ -3,8 +3,6 @@
 set -eo pipefail
 
 # Environment variables used
-# FLEET_ADMIN_PASSWORD - used for new fleet user [elastic]
-# FLEET_ADMIN_USERNAME - used for new fleet user [changeme]
 # FLEET_CONFIG_ID - config related to new token [defaul]
 # FLEET_ENROLLMENT_TOKEN - existing enrollment token to be used for enroll
 # FLEET_ENROLL - if set to 1 enroll will be performed
@@ -19,7 +17,6 @@ function setup(){
   curl -X POST  ${KIBANA_HOST:-http://localhost:5601}/api/ingest_manager/fleet/setup \
     -H 'Content-Type: application/json' \
     -H 'kbn-xsrf: true' \
-    -d '{"admin_username":"'"${FLEET_ADMIN_USERNAME:-elastic}"'","admin_password":"'"${FLEET_ADMIN_PASSWORD:-changeme}"'"}' \
     -u ${KIBANA_USERNAME:-elastic}:${KIBANA_PASSWORD:-changeme}
 }
 

x-pack/elastic-agent/CHANGELOG.asciidoc

@@ -35,6 +35,7 @@
 - Stop monitoring on config change {pull}18284[18284]
 - Fix jq: command not found {pull}18408[18408]
 - Avoid Chown on windows {pull}18512[18512]
+- Remove fleet admin from setup script {pull}18611[18611]
 
 ==== New features
 

x-pack/elastic-agent/magefile.go

@@ -419,7 +419,7 @@ func (Demo) NoEnroll() error {
 }
 
 func runAgent(env map[string]string) error {
-	supportedEnvs := map[string]int{"FLEET_ADMIN_PASSWORD": 0, "FLEET_ADMIN_USERNAME": 0, "FLEET_CONFIG_ID": 0, "FLEET_ENROLLMENT_TOKEN": 0, "FLEET_ENROLL": 0, "FLEET_SETUP": 0, "FLEET_TOKEN_NAME": 0, "KIBANA_HOST": 0, "KIBANA_PASSWORD": 0, "KIBANA_USERNAME": 0}
+	supportedEnvs := map[string]int{"FLEET_CONFIG_ID": 0, "FLEET_ENROLLMENT_TOKEN": 0, "FLEET_ENROLL": 0, "FLEET_SETUP": 0, "FLEET_TOKEN_NAME": 0, "KIBANA_HOST": 0, "KIBANA_PASSWORD": 0, "KIBANA_USERNAME": 0}
 
 	tag := dockerTag()
 	dockerImageOut, err := sh.Output("docker", "image", "ls")