OZG-4792 Removed old function from Jenkinsfile

Jenkinsfile

@@ -12,7 +12,6 @@ pipeline {
         SH_SUCCESS_STATUS_CODE = 0
         IMAGE_TAG = generateImageTag()
         HELM_CHART_VERSION = generateHelmChartVersion()
-        BUILD_TAG = generateBuildTag()
         BUILD_PROFILE = setBuildProfile()
     }
 
@@ -159,19 +158,6 @@ String generateImageTag() {
     return "${env.BRANCH_NAME}-${getPomVersion()}"
 }
 
-String generateBuildTag() {
-
-    def buildName = "docker.ozg-sh.de/administration"
-    def buildTag = buildName+":"+generateImageTag()
-
-    if (isMasterBranch()) {
-        buildTag += ","+buildName+":snapshot-latest"
-    } else if (isReleaseBranch()) {
-        buildTag += ","+buildName+":latest"
-    }
-    return buildTag
-}
-
 String getPomVersion() {
     def pom = readMavenPom file: 'pom.xml'