remove relationship field type validation (#532)

Co-authored-by: Yang Yang <yanyang@yanyang-mn2985.linkedin.biz>

Author: yangyangv2

validators/src/main/java/com/linkedin/metadata/validator/RelationshipValidator.java

@@ -65,11 +65,6 @@ public static void validateRelationshipSchema(@Nonnull RecordDataSchema schema,
       }
       // include "pairings" annotation
       validatePairings(schema);
-      // includes only primitive types
-      ValidationUtils.fieldsUsingInvalidType(schema, ValidationUtils.PRIMITIVE_TYPES).forEach(field -> {
-        ValidationUtils.invalidSchema("Relationship '%s' contains a field '%s' that makes use of a disallowed type '%s'.",
-            className, field.getName(), field.getType().getType());
-      });
     } else {
       // include "destination" field of UNION field
       if (!ValidationUtils.schemaHasExactlyOneSuchField(schema,