Removes unused functions

src/main/java/CredentialRepository.java

@@ -60,21 +60,6 @@ public class CredentialRepository implements CredentialRepositoryInterface{
         }
 
 
-    }
-
-    @Override
-    public void setCredentials() {
-
-    }
-
-    @Override
-    public void getAsJSON() {
-
-    }
-
-    @Override
-    public void loadCredentialsFromJSON() {
-
     }
 
     private int getListSize()

src/main/java/CredentialRepositoryInterface.java

@@ -5,8 +5,5 @@ public interface CredentialRepositoryInterface {
     void delete();
     Credential getCredentialsViaName(String needle);
     Credential getCredentialsViaId(int id);
-    void setCredentials();
-    void getAsJSON();
-    void loadCredentialsFromJSON();
 
 }