wrote failing test for example so removing from docs

Author: shwoodard

README.md

@@ -343,37 +343,6 @@ func (post Post) JSONAPIRelationshipMeta(relation string) *Meta {
 }
 ```
 
-### Custom types
-
-If you need to support custom types (e.g. for custom time formats), you'll need to implement the json.Marshaler and json.Unmarshaler interfaces on the type.
-
-```go
-// MyTimeFormat is a custom format I invented for fun
-const MyTimeFormat = "The time is 15:04:05. The year is 2006, and it is day 2 of January."
-
-// MyTime is a custom type used to handle the custom time format
-type MyTime struct {
-	time.Time
-}
-
-// UnmarshalJSON to implement the json.Unmarshaler interface
-func (m *MyTime) UnmarshalJSON(b []byte) error {
-	t, err := time.Parse(MyTimeFormat, string(b))
-	if err != nil {
-		return err
-	}
-
-	m.Time = t
-
-	return nil
-}
-
-// MarshalJSON to implement the json.Marshaler interface
-func (m *MyTime) MarshalJSON() ([]byte, error) {
-	return json.Marshal(m.Time.Format(MyTimeFormat))
-}
-```
-
 ### Errors
 This package also implements support for JSON API compatible `errors` payloads using the following types.