fix: more specific errors

Author: wtrocki

tools/spectral/ipa/rulesets/functions/IPA125OneOfMustHaveDiscriminator.js

@@ -3,7 +3,6 @@ import { resolveObject } from './utils/componentUtils.js';
 import { hasException } from './utils/exceptions.js';
 
 const RULE_NAME = 'xgen-IPA-125-oneOf-must-have-discriminator';
-const GENERIC_ERROR_MESSAGE = 'Each oneOf property must include a discriminator property to define the exact type.';
 const MISSING_DISCRIMINATOR_MESSAGE = 'The schema has oneOf but no discriminator property.';
 const INVALID_DISCRIMINATOR_MESSAGE = 'Discriminator property is not an object.';
 const MISSING_PROPERTY_NAME_MESSAGE = 'Discriminator has no propertyName defined.';