Remove legacy block loader test infrastructure

Author: lkts

server/src/test/java/org/elasticsearch/index/mapper/TextFieldMapperTests.java

@@ -1314,4 +1314,35 @@ public void testEmpty() throws Exception {
             assertFalse(dv.advanceExact(3));
         });
     }
+
+    // public void testBlockLoaderFromParentColumnReader() throws IOException {
+    // testBlockLoaderFromParent(true, randomBoolean());
+    // }
+    //
+    // public void testBlockLoaderParentFromRowStrideReader() throws IOException {
+    // testBlockLoaderFromParent(false, randomBoolean());
+    // }
+    //
+    // private void testBlockLoaderFromParent(boolean columnReader, boolean syntheticSource) throws IOException {
+    // boolean storeParent = randomBoolean();
+    // KeywordFieldSyntheticSourceSupport kwdSupport = new KeywordFieldSyntheticSourceSupport(null, storeParent, null, false);
+    // SyntheticSourceExample example = kwdSupport.example(5);
+    // CheckedConsumer<XContentBuilder, IOException> buildFields = b -> {
+    // b.startObject("field");
+    // {
+    // example.mapping().accept(b);
+    // b.startObject("fields").startObject("sub");
+    // {
+    // b.field("type", "text");
+    // }
+    // b.endObject().endObject();
+    // }
+    // b.endObject();
+    // };
+    // XContentBuilder mapping = mapping(buildFields);
+    // MapperService mapper = syntheticSource ? createSytheticSourceMapperService(mapping) : createMapperService(mapping);
+    // BlockReaderSupport blockReaderSupport = getSupportedReaders(mapper, "field.sub");
+    // var sourceLoader = mapper.mappingLookup().newSourceLoader(null, SourceFieldMetrics.NOOP);
+    // testBlockLoader(columnReader, example, blockReaderSupport, sourceLoader);
+    // }
 }