Revert "Use the reader in Lucene BWC"

This reverts commit 064392f.

Author: thecoop

server/src/main/java/org/elasticsearch/index/codec/vectors/ES814ScalarQuantizedVectorsFormat.java

@@ -9,7 +9,6 @@
 
 package org.elasticsearch.index.codec.vectors;
 
-import org.apache.lucene.backward_codecs.lucene99.Lucene99ScalarQuantizedVectorsReader;
 import org.apache.lucene.codecs.hnsw.FlatFieldVectorsWriter;
 import org.apache.lucene.codecs.hnsw.FlatVectorScorerUtil;
 import org.apache.lucene.codecs.hnsw.FlatVectorsFormat;