Removed unused code

.github/workflows/verify-backend-service.yaml

@@ -17,6 +17,7 @@ on:
   push:
     branches:
       - main
+      - feat/backend-service
 
   pull_request:
     branches:

mxd/backend-service/src/main/java/org/eclipse/tractusx/mxd/backendservice/entity/Content.java

@@ -60,12 +60,5 @@ public Builder data(String data) {
         public Builder self() {
             return this;
         }
-
-        @Override
-        public Content build() {
-            super.build();
-
-            return entity;
-        }
     }
 }

mxd/backend-service/src/main/java/org/eclipse/tractusx/mxd/backendservice/entity/Transfer.java

@@ -21,6 +21,8 @@
 
 import java.util.Map;
 
+import static java.util.Objects.requireNonNull;
+
 @JsonDeserialize(builder = Transfer.Builder.class)
 public class Transfer extends Entity {
 
@@ -98,6 +100,10 @@ public Builder self() {
         @Override
         public Transfer build() {
             super.build();
+            requireNonNull(entity.id);
+            requireNonNull(entity.endpoint);
+            requireNonNull(entity.authKey);
+            requireNonNull(entity.authCode);
             return entity;
         }
     }

mxd/backend-service/src/main/java/org/eclipse/tractusx/mxd/backendservice/service/HttpConnectionService.java

@@ -14,7 +14,6 @@
 
 package org.eclipse.tractusx.mxd.backendservice.service;
 
-import okhttp3.OkHttpClient;
 import okhttp3.Request;
 import okhttp3.Response;
 import org.eclipse.edc.spi.http.EdcHttpClient;

mxd/backend-service/src/main/java/org/eclipse/tractusx/mxd/backendservice/store/TransferStoreService.java

@@ -27,7 +27,6 @@
 @ExtensionPoint
 public interface TransferStoreService {
 
-    String CONTRACT_EXISTS = "Transfer with ID %s already exists";
     String CONTRACT_NOT_FOUND = "Transfer with ID %s not found";
 
     /**