diff --git a/src/main/java/com/loafle/overflow/container/general/util/Primitives.java b/src/main/java/com/loafle/overflow/container/general/util/Primitives.java
deleted file mode 100644
index 7169ec6..0000000
--- a/src/main/java/com/loafle/overflow/container/general/util/Primitives.java
+++ /dev/null
@@ -1,44 +0,0 @@
-package com.loafle.overflow.container.general.util;
-
-import java.lang.reflect.Type;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.Map;
-
-public final class Primitives {
-    /** A map from primitive types to their corresponding wrapper types. */
-    private static final Map<Class<?>, Class<?>> PRIMITIVE_TO_WRAPPER_TYPE;
-    /** A map from wrapper types to their corresponding primitive types. */
-    private static final Map<Class<?>, Class<?>> WRAPPER_TO_PRIMITIVE_TYPE;
-
-    static {
-        Map<Class<?>, Class<?>> primToWrap = new HashMap<Class<?>, Class<?>>(16);
-        Map<Class<?>, Class<?>> wrapToPrim = new HashMap<Class<?>, Class<?>>(16);
-
-        add(primToWrap, wrapToPrim, boolean.class, Boolean.class);
-        add(primToWrap, wrapToPrim, byte.class, Byte.class);
-        add(primToWrap, wrapToPrim, char.class, Character.class);
-        add(primToWrap, wrapToPrim, double.class, Double.class);
-        add(primToWrap, wrapToPrim, float.class, Float.class);
-        add(primToWrap, wrapToPrim, int.class, Integer.class);
-        add(primToWrap, wrapToPrim, long.class, Long.class);
-        add(primToWrap, wrapToPrim, short.class, Short.class);
-        add(primToWrap, wrapToPrim, void.class, Void.class);
-
-        PRIMITIVE_TO_WRAPPER_TYPE = Collections.unmodifiableMap(primToWrap);
-        WRAPPER_TO_PRIMITIVE_TYPE = Collections.unmodifiableMap(wrapToPrim);
-    }
-
-    private static void add(Map<Class<?>, Class<?>> forward,
-                            Map<Class<?>, Class<?>> backward, Class<?> key, Class<?> value) {
-        forward.put(key, value);
-        backward.put(value, key);
-    }
-    /**
-     * Returns true if this type is a primitive.
-     */
-    public static boolean isPrimitive(Type type) {
-        return PRIMITIVE_TO_WRAPPER_TYPE.containsKey(type);
-    }
-
-}