Fixed a few places

Author: chernser

client-v2/src/main/java/com/clickhouse/client/api/data_formats/internal/BinaryStreamReader.java

@@ -25,14 +25,11 @@
 import java.time.ZonedDateTime;
 import java.time.temporal.TemporalAmount;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
-import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.Set;
 import java.util.TimeZone;
 import java.util.UUID;
 
@@ -1148,14 +1145,6 @@ public byte[] allocate(int size) {
         }
     }
 
-    private static final Set<Byte> DECIMAL_TAGS = Collections.unmodifiableSet(new HashSet<>(Arrays.asList(
-            ClickHouseDataType.Decimal.getBinTag(),
-            ClickHouseDataType.Decimal32.getBinTag(),
-            ClickHouseDataType.Decimal64.getBinTag(),
-            ClickHouseDataType.Decimal128.getBinTag(),
-            ClickHouseDataType.Decimal256.getBinTag()
-    )));
-
     private ClickHouseColumn readDynamicData() throws IOException {
         byte tag = readByte();
 
@@ -1314,7 +1303,7 @@ private ClickHouseColumn readDynamicData() throws IOException {
                 variant.append("Variant(");
                 for (int i = 0; i < variants; i++) {
                     ClickHouseColumn column = readDynamicData();
-                    variant.append(column.getOriginalTypeName() + ",");
+                    variant.append(column.getOriginalTypeName()).append(',');
                 }
                 variant.setLength(variant.length() - 1);
                 variant.append(")");

client-v2/src/test/java/com/clickhouse/client/datatypes/DataTypeTests.java

@@ -656,7 +656,6 @@ public void testDynamicWithTime64Types() throws Exception {
 
         Instant time64 = Instant.ofEpochSecond(TimeUnit.HOURS.toSeconds(999) + TimeUnit.MINUTES.toSeconds(59) + 59);
         long time64Value = time64.getEpochSecond() * 1_000_000_000 + time64.getNano();
-        System.out.println(time64Value);
         testDynamicWith("Time64",
                 new Object[]{
                         time64Value