Removed useless ObjectMapper field

Author: burdoto

src/main/java/io/codebottle/api/CodeBottle.java

@@ -15,18 +15,12 @@
 import org.jetbrains.annotations.Nullable;
 
 public final class CodeBottle {
-    private static final ObjectMapper objectMapper;
-
     private final Map<Integer, Language> languageCache = new ConcurrentHashMap<>();
     private final Map<Integer, Category> categoryCache = new ConcurrentHashMap<>();
     private final Map<Integer, Snippet> snippetCache = new ConcurrentHashMap<>();
 
     private final String token;
 
-    static {
-        objectMapper = new ObjectMapper();
-    }
-
     public CodeBottle() {
         this(null);
     }