S3 uploader cleanup

DriveBackup/src/main/java/ratismal/drivebackup/uploaders/s3/S3Uploader.java

@@ -24,14 +24,12 @@
 import static ratismal.drivebackup.config.Localization.intl;
 
 public class S3Uploader extends Uploader {
-    private UploadLogger logger;
 
     public static final String UPLOADER_NAME = "S3";
     public static final String UPLOADER_ID = "s3";
 
     private MinioClient minioClient;
-
-    private boolean _errorOccurred;
+
     private String _bucket;
     private String _hostname;
 
@@ -68,11 +66,6 @@ public boolean isAuthenticated() {
         return true;
     }
 
-    @Override
-    public boolean isErrorWhileUploading() {
-        return _errorOccurred;
-    }
-
     @Override
     public void test(File testFile) {
         try {
@@ -109,10 +102,6 @@ public void uploadFile(File file, String type) {
     public void close() {
     }
 
-    public void setErrorOccurred(boolean errorOccurred) {
-        _errorOccurred = errorOccurred;
-    }
-
     public void pruneBackups(String type) throws Exception {
         int fileLimit = ConfigParser.getConfig().backupStorage.keepCount;
         if (fileLimit == -1) {
@@ -146,7 +135,7 @@ private TreeMap<ZonedDateTime, Item> getZipFiles(String type) throws Exception {
     }
 
     @NotNull
-    private String normalizeType(@NotNull String type) {
+    private static String normalizeType(@NotNull String type) {
         if(type.startsWith("./")) {
             return type.substring(2);
         }