Remove isHostObject helper.

lodash.js

@@ -1164,25 +1164,6 @@
     return reHasUnicodeWord.test(string);
   }
 
-  /**
-   * Checks if `value` is a host object in IE < 9.
-   *
-   * @private
-   * @param {*} value The value to check.
-   * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
-   */
-  function isHostObject(value) {
-    // Many host objects are `Object` objects that can coerce to strings
-    // despite having improperly defined `toString` methods.
-    var result = false;
-    if (value != null && typeof value.toString != 'function') {
-      try {
-        result = !!(value + '');
-      } catch (e) {}
-    }
-    return result;
-  }
-
   /**
    * Converts `iterator` to an array.
    *
@@ -2532,9 +2513,6 @@
           return cloneBuffer(value, isDeep);
         }
         if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
-          if (isHostObject(value)) {
-            return object ? value : {};
-          }
           result = initCloneObject(isFunc ? {} : value);
           if (!isDeep) {
             return copySymbols(value, baseAssign(result, value));
@@ -3178,8 +3156,8 @@
         othTag = getTag(other);
         othTag = othTag == argsTag ? objectTag : othTag;
       }
-      var objIsObj = objTag == objectTag && !isHostObject(object),
-          othIsObj = othTag == objectTag && !isHostObject(other),
+      var objIsObj = objTag == objectTag,
+          othIsObj = othTag == objectTag,
           isSameTag = objTag == othTag;
 
       if (isSameTag && !objIsObj) {
@@ -3284,7 +3262,7 @@
       if (!isObject(value) || isMasked(value)) {
         return false;
       }
-      var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
+      var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
       return pattern.test(toSource(value));
     }
 
@@ -11713,8 +11691,7 @@
      * // => true
      */
     function isPlainObject(value) {
-      if (!isObjectLike(value) ||
-          objectToString.call(value) != objectTag || isHostObject(value)) {
+      if (!isObjectLike(value) || objectToString.call(value) != objectTag) {
         return false;
       }
       var proto = getPrototype(value);