remove unused method

src/main/java/dk/kb/netarchivesuite/solrwayback/export/StreamingRawZipExport.java

@@ -5,15 +5,13 @@
 import dk.kb.netarchivesuite.solrwayback.service.dto.WarcMetadataFromSolr;
 import dk.kb.netarchivesuite.solrwayback.solr.SRequest;
 import dk.kb.netarchivesuite.solrwayback.solr.SolrGenericStreaming;
-import dk.kb.netarchivesuite.solrwayback.util.SolrUtils;
 import org.apache.cxf.helpers.IOUtils;
 import org.apache.solr.common.SolrDocument;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
 import java.io.OutputStream;
-import java.text.Normalizer;
 import java.util.Arrays;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipOutputStream;
@@ -57,16 +55,6 @@ public void getStreamingOutputWithZipOfContent(String query,
         log.info("Zip export has completed. {} warc entries with the contentType: '{}' have been streamed, zipped and delivered.", streamedDocs, contentType);
     }
 
-    /**
-     * Normalize content type.
-     * @param contentType string to normalize.
-     * @return            normalized contentType string.
-     */
-    private String normalizeContentType(String contentType) {
-        String normalizedContentType = Normalizer.normalize(contentType, Normalizer.Form.NFD);
-        return normalizedContentType.replaceAll("[^\\x00-\\x7F]", "");
-    }
-
     /**
      * Extract metadata for a WARC entry from a Solr Document.
      * The method extracts, the ID, mimetype and fileextension for the WARC entry.