Revert assert in mapDictionaryToMetadataItems

Author: kean

Sources/WordPressData/Swift/PostHelper+Metadata.swift

@@ -24,9 +24,6 @@ extension PostHelper {
     public static func mapDictionaryToMetadataItems(_ dictionary: [String: Any]) -> RemotePostMetadataItem? {
         let id = dictionary["id"]
         let value = dictionary["value"]
-        if let value {
-            wpAssert(value is String, "only strings are currently supported by WordPressKit")
-        }
         return RemotePostMetadataItem(
             id: (id as? String) ?? (id as? NSNumber)?.stringValue,
             key: dictionary["key"] as? String,