removede functional interface annotation

Author: BastiaanJansen

src/main/java/com/bastiaanjansen/jwt/ClaimConverter.java

@@ -1,6 +1,5 @@
 package com.bastiaanjansen.jwt;
 
-@FunctionalInterface
 public interface ClaimConverter<T> {
     T convert(Object value);
 }

src/main/java/com/bastiaanjansen/jwt/ClaimValidator.java

@@ -1,6 +1,5 @@
 package com.bastiaanjansen.jwt;
 
-@FunctionalInterface
 public interface ClaimValidator {
     boolean validate(Object value);
 }