refactor: made OrganizationRepository consistent with Repository

src/main/java/edu/group5/app/model/organization/OrganizationRepository.java

@@ -9,27 +9,15 @@
 /**
  * Handles the business logic associated with organizations
  */
-public class OrganizationRepository extends Repository {
-  private final Map<Integer, Organization> content;
-
+public class OrganizationRepository extends Repository<Integer, Organization> {
   /**
    * Creates a new Organization Repository
    *
    * @param content holds all current organizations in the repository; must not be null
    * @throws NullPointerException if content is null
    */
   public OrganizationRepository(Map<Integer, Organization> content) {
-    this.content = Objects.requireNonNull(content, "content cannot be null");
-    super(content);
-  }
-
-  /**
-   * Returns the organizations within the repository.
-   * @return all organizations within the repository.
-   */
-  @Override
-  public Map<Integer, Organization> getContent() {
-    return content;
+    super(Objects.requireNonNull(content, "content cannot be null"));
   }
 
   /**