Moved fix from last commit into interface default method

Author: retrodaredevil

couchdb/src/main/java/me/retrodaredevil/couchdbjava/CouchDbDatabase.java

@@ -77,7 +77,7 @@ default DocumentResponse updateDocument(String id, DocumentEntityTag eTag, JsonD
 	 * @throws CouchDbException May represent a connection error or that a document wasn't found, permission error, etc.
 	 */
 	default DocumentData getDocumentIfUpdated(String id, String revision) throws CouchDbException {
-		return getDocumentIfUpdated(id, DocumentEntityTag.fromRevision(revision));
+		return getDocumentIfUpdated(id, revision == null ? null : DocumentEntityTag.fromRevision(revision));
 	}
 
 	DocumentData getDocumentIfUpdated(String id, DocumentEntityTag eTag) throws CouchDbException;

couchdb/src/main/java/me/retrodaredevil/couchdbjava/okhttp/OkHttpCouchDbDatabase.java

@@ -225,11 +225,6 @@ public DocumentData getDocument(String id) throws CouchDbException {
 		return getDocumentIfUpdated(id, (DocumentEntityTag) null);
 	}
 
-	@Override
-	public DocumentData getDocumentIfUpdated(String id, String revision) throws CouchDbException {
-		return getDocumentIfUpdated(id, revision == null ? null : DocumentEntityTag.fromRevision(revision));
-	}
-
 	@Override
 	public DocumentData getDocumentIfUpdated(String id, @Nullable DocumentEntityTag eTag) throws CouchDbException {
 		// https://docs.couchdb.org/en/stable/api/document/common.html#get--db-docid