remove unused code

Author: chernser

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

@@ -1189,20 +1189,5 @@ public static void writeDateTime64(OutputStream output, Object value, int scale,
 
         BinaryStreamUtils.writeInt64(output, ts);
     }
-
-    public static final Map<Class<?>, Class<?>> PRIMITIVE_2_WRAPPER_CLASS = getPrimitive2WrapperClassMap();
-
-    private static Map<Class<?>, Class<?>> getPrimitive2WrapperClassMap() {
-        Map<Class<?>, Class<?>> map = new HashMap<>();
-        map.put(boolean.class, Boolean.class);
-        map.put(byte.class, Byte.class);
-        map.put(char.class, Character.class);
-        map.put(short.class, Short.class);
-        map.put(int.class, Integer.class);
-        map.put(long.class, Long.class);
-        map.put(float.class, Float.class);
-        map.put(double.class, Double.class);
-
-        return map;
-    }
+    
 }