fix compile

Author: rjernst

build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/release/ExtractCurrentVersionsTask.java

@@ -53,9 +53,6 @@ public void executeTask() throws IOException {
         LOGGER.lifecycle("Extracting latest version information");
 
         List<String> output = new ArrayList<>();
-        int transportVersion = readLatestVersion(rootDir.resolve(TRANSPORT_VERSIONS_FILE_PATH));
-        LOGGER.lifecycle("Transport version: {}", transportVersion);
-        output.add(TRANSPORT_VERSION_TYPE + ":" + transportVersion);
 
         int indexVersion = readLatestVersion(rootDir.resolve(INDEX_VERSIONS_FILE_PATH));
         LOGGER.lifecycle("Index version: {}", indexVersion);