Remove colors dataset from knn

Author: carlosdelest

x-pack/plugin/esql/qa/testFixtures/src/main/java/org/elasticsearch/xpack/esql/CsvTestsDataLoader.java

@@ -144,7 +144,6 @@ public class CsvTestsDataLoader {
     private static final TestDataset LOGS = new TestDataset("logs");
     private static final TestDataset MV_TEXT = new TestDataset("mv_text");
     private static final TestDataset DENSE_VECTOR = new TestDataset("dense_vector");
-    private static final TestDataset COLORS = new TestDataset("colors");
 
     public static final Map<String, TestDataset> CSV_DATASET_MAP = Map.ofEntries(
         Map.entry(EMPLOYEES.indexName, EMPLOYEES),
@@ -205,8 +204,7 @@ public class CsvTestsDataLoader {
         Map.entry(SEMANTIC_TEXT.indexName, SEMANTIC_TEXT),
         Map.entry(LOGS.indexName, LOGS),
         Map.entry(MV_TEXT.indexName, MV_TEXT),
-        Map.entry(DENSE_VECTOR.indexName, DENSE_VECTOR),
-        Map.entry(COLORS.indexName, COLORS)
+        Map.entry(DENSE_VECTOR.indexName, DENSE_VECTOR)
     );
 
     private static final EnrichConfig LANGUAGES_ENRICH = new EnrichConfig("languages_policy", "enrich-policy-languages.json");