diff --git a/docs/prow/authorization.md b/docs/prow/authorization.md
index d8e83c4bfbbe..291895625ef4 100644
--- a/docs/prow/authorization.md
+++ b/docs/prow/authorization.md
@@ -9,7 +9,6 @@ To deploy a Prow cluster, configure the following service accounts in the Google
 | **sa-gke-kyma-integration**   | Runs integration tests on a GKE cluster. | `Cloud KMS CryptoKey Encrypter/Decrypter` (`roles/cloudkms.cryptoKeyVersions.useToDecrypt`,`roles/cloudkms.cryptoKeyVersions.useToEncrypt`,`roles/resourcemanager.projects.get`), `Compute Admin` (`roles/compute.admin`), `Compute Network Admin`,`Kubernetes Engine Admin` (`roles/container.admin`), `Kubernetes Engine Cluster Admin` (`roles/container.clusterAdmin`), `DNS Administrator` (`roles/dns.admin`), `Service Account User` (`roles/iam.serviceAccountUser`), `Storage Admin` (`roles/storage.admin`)
 | **sa-kyma-artifacts**         | Saves release and development artifacts to the GCS bucket. | `Storage Object Admin` (`roles/storage.objectAdmin`)
 | **sa-vm-kyma-integration**    | Runs integration tests on k3d. | `Compute Instance Admin (beta)` (`roles/compute.instanceAdmin`), `Compute OS Admin Login` (`roles/compute.osAdminLogin`), `Service Account User` (`roles/iam.serviceAccountUser`)
-| **sa-gcs-plank**              | Currently not in use. | no roles attached
 | **sa-crier**                  | Reports Prow Job statuses to GitHub. | `Service Account User` |
 
 
diff --git a/pkg/tools/pjtester/test_artifacts/test-prow-config.yaml b/pkg/tools/pjtester/test_artifacts/test-prow-config.yaml
index 9e017b397b87..aa00ce0714ff 100644
--- a/pkg/tools/pjtester/test_artifacts/test-prow-config.yaml
+++ b/pkg/tools/pjtester/test_artifacts/test-prow-config.yaml
@@ -30,7 +30,6 @@ plank:
       gcs_configuration:
         bucket: kyma-prow-logs
         path_strategy: "explicit"
-      gcs_credentials_secret: "sa-gcs-plank" # Service account with "Object Admin" role
 
 deck:
   spyglass:
diff --git a/prow/workload-cluster/trusted-workload/trusted_workloadidentity_serviceaccount.yaml b/prow/workload-cluster/trusted-workload/trusted_workloadidentity_serviceaccount.yaml
index 21a9facd224f..6c11bac2a878 100644
--- a/prow/workload-cluster/trusted-workload/trusted_workloadidentity_serviceaccount.yaml
+++ b/prow/workload-cluster/trusted-workload/trusted_workloadidentity_serviceaccount.yaml
@@ -2,14 +2,6 @@
 ---
 apiVersion: v1
 kind: ServiceAccount
-metadata:
-  annotations:
-    iam.gke.io/gcp-service-account: sa-gcs-plank@sap-kyma-prow.iam.gserviceaccount.com
-  name: prowjob-default-sa
-  namespace: default
----
-apiVersion: v1
-kind: ServiceAccount
 metadata:
   annotations:
     iam.gke.io/gcp-service-account: sa-gcr-push-kyma-project@sap-kyma-prow.iam.gserviceaccount.com
diff --git a/prow/workload-cluster/untrusted_workloadidentity_serviceaccount.yaml b/prow/workload-cluster/untrusted_workloadidentity_serviceaccount.yaml
index df10c95916bb..5dc0bc06d1ad 100644
--- a/prow/workload-cluster/untrusted_workloadidentity_serviceaccount.yaml
+++ b/prow/workload-cluster/untrusted_workloadidentity_serviceaccount.yaml
@@ -1,13 +1,5 @@
 # Service Accounts linked to Google Workload Identity
 ---
-- apiVersion: v1
-  kind: ServiceAccount
-  metadata:
-    annotations:
-      iam.gke.io/gcp-service-account: sa-gcs-plank@sap-kyma-prow.iam.gserviceaccount.com
-    name: prowjob-default-sa
-    namespace: default
----
 - apiVersion: v1
   kind: ServiceAccount
   metadata: