remove Builder from CoreConfiguration

Author: marceljk

services/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/ApiClient.java

@@ -95,7 +95,7 @@ public class ApiClient {
 
 	/** Basic constructor for ApiClient */
 	public ApiClient() throws IOException {
-		this(new CoreConfiguration.Builder().build());
+		this(new CoreConfiguration());
 	}
 
 	/**

services/resourcemanager/src/main/java/cloud/stackit/sdk/resourcemanager/api/DefaultApi.java

@@ -47,7 +47,7 @@ public class DefaultApi {
 	private String localCustomBaseUrl;
 
 	public DefaultApi() throws IOException {
-		this(new CoreConfiguration.Builder().build());
+		this(new CoreConfiguration());
 	}
 
 	public DefaultApi(CoreConfiguration config) throws IOException {