Merge remote-tracking branch 'carlosdelest/non-issue/esql-knn-exact-search-non-pushed' into non-issue/esql-knn-exact-search-non-pushed

Author: carlosdelest

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/vector/Knn.java

@@ -54,7 +54,6 @@
 import static java.util.Map.entry;
 import static org.elasticsearch.common.logging.LoggerMessageFormat.format;
 import static org.elasticsearch.index.query.AbstractQueryBuilder.BOOST_FIELD;
-import static org.elasticsearch.search.vectors.KnnVectorQueryBuilder.NUM_CANDS_FIELD;
 import static org.elasticsearch.search.vectors.KnnVectorQueryBuilder.VECTOR_SIMILARITY_FIELD;
 import static org.elasticsearch.xpack.esql.core.expression.TypeResolutions.ParamOrdinal.FIRST;
 import static org.elasticsearch.xpack.esql.core.expression.TypeResolutions.ParamOrdinal.FOURTH;