Revert "Fix types"

This reverts commit 09e27ea.

packages/client-assertion-validation/src/validation.ts

@@ -30,9 +30,7 @@ import {
   ClientAssertion,
   ClientAssertionValidationRequest,
   ConsumerKey,
-  FailedValidation,
   Key,
-  SuccessfulValidation,
   ValidationResult,
 } from "./types.js";
 import {
@@ -115,20 +113,23 @@ type ValidationOutput = {
 
 function isValidationSuccess(
   validationResult: ValidationResult<unknown>
-): validationResult is SuccessfulValidation<unknown> {
-  return "data" in validationResult && validationResult.data !== undefined;
+): validationResult is Extract<typeof validationResult, { data: unknown }> {
+  return "data" in validationResult && Boolean(validationResult.data);
 }
 
 function isValidationError(
   validationResult: ValidationResult<unknown>
-): validationResult is FailedValidation {
+): validationResult is Extract<typeof validationResult, { errors: unknown }> {
   return "errors" in validationResult && Array.isArray(validationResult.errors);
 }
 
 function isAllValidationSuccess(
   validationOutput: ValidationOutput
 ): validationOutput is {
-  [TKey in keyof ValidationOutput]: SuccessfulValidation<unknown>;
+  [TKey in keyof typeof validationOutput]: Extract<
+    (typeof validationOutput)[TKey],
+    { data: unknown }
+  >;
 } {
   return Object.values(validationOutput).every(isValidationSuccess);
 }
@@ -229,7 +230,6 @@ export const validateClientKindAndPlatformState = (
         const validationResult = validatePlatformState(key as ConsumerKey);
 
         if (isValidationSuccess(validationResult)) {
-          validationResult.data;
           // ...
         } else {
           validationResult.errors;