Remove reader function from method signature

Signed-off-by: Sooraj Sinha <soosinha@amazon.com>

Author: soosinha

server/src/main/java/org/opensearch/repositories/blobstore/ChecksumWritableBlobStoreFormat.java

@@ -84,7 +84,7 @@ public void close() throws IOException {
         }
     }
 
-    public T deserialize(String blobName, CheckedFunction<StreamInput, T, IOException> reader, BytesReference bytes) throws IOException {
+    public T deserialize(String blobName, BytesReference bytes) throws IOException {
         final String resourceDesc = "ChecksumBlobStoreFormat.readBlob(blob=\"" + blobName + "\")";
         try {
             final IndexInput indexInput = bytes.length() > 0

server/src/test/java/org/opensearch/repositories/blobstore/ChecksumWritableBlobStoreFormatTests.java

@@ -36,7 +36,7 @@ public class ChecksumWritableBlobStoreFormatTests extends OpenSearchTestCase {
     public void testSerDe() throws IOException {
         IndexMetadata indexMetadata = getIndexMetadata();
         BytesReference bytesReference = clusterBlocksFormat.serialize(indexMetadata, TEST_BLOB_FILE_NAME, CompressorRegistry.none());
-        IndexMetadata readIndexMetadata = clusterBlocksFormat.deserialize(TEST_BLOB_FILE_NAME, IndexMetadata::readFrom, bytesReference);
+        IndexMetadata readIndexMetadata = clusterBlocksFormat.deserialize(TEST_BLOB_FILE_NAME, bytesReference);
         assertThat(readIndexMetadata, is(indexMetadata));
     }
 
@@ -47,7 +47,7 @@ public void testSerDeForCompressed() throws IOException {
             TEST_BLOB_FILE_NAME,
             CompressorRegistry.getCompressor(DeflateCompressor.NAME)
         );
-        IndexMetadata readIndexMetadata = clusterBlocksFormat.deserialize(TEST_BLOB_FILE_NAME, IndexMetadata::readFrom, bytesReference);
+        IndexMetadata readIndexMetadata = clusterBlocksFormat.deserialize(TEST_BLOB_FILE_NAME, bytesReference);
         assertThat(readIndexMetadata, is(indexMetadata));
     }