Revert "Allows image repositories builds staffeln image"

This reverts commit aae84ebcb74e91fceffca7d17fb1f4ee1610c605.
diff --git a/internal/pkg/image_repositories/build_workflow.go b/internal/pkg/image_repositories/build_workflow.go
index 9c996f7..658f8cd 100644
--- a/internal/pkg/image_repositories/build_workflow.go
+++ b/internal/pkg/image_repositories/build_workflow.go
@@ -11,9 +11,6 @@
 	"keystone": true,
 	"magnum":   true,
 }
-var VEXXHOST_PROJECTS map[string]bool = map[string]bool{
-	"staffeln": true,
-}
 var EXTRAS map[string]string = map[string]string{}
 var PROFILES map[string]string = map[string]string{
 	"cinder":            "ceph qemu",
@@ -84,9 +81,6 @@
 	if _, ok := FORKED_PROJECTS[project]; ok {
 		gitRepo = fmt.Sprintf("https://github.com/vexxhost/%s", project)
 	}
-	if _, ok := VEXXHOST_PROJECTS[project]; ok {
-		gitRepo = fmt.Sprintf("https://github.com/vexxhost/%s", project)
-	}
 
 	buildArgs := []string{
 		"BUILDER_IMAGE=quay.io/vexxhost/openstack-builder-${{ matrix.from }}",
@@ -105,9 +99,6 @@
 	if project == "magnum" {
 		releases = []string{"yoga", "zed", "2023.1"}
 	}
-	if project == "staffeln" {
-		releases = []string{"2023.1"}
-	}
 
 	return &GithubWorkflow{
 		Name: "build",