fix(api): consistent responses from certificate/showCert (#54426)

api/src/utils/error-formatting.ts

@@ -1,7 +1,4 @@
 import { ErrorObject } from 'ajv';
-import { certTypes } from '../../../shared/config/certification-settings';
-
-type CertLogs = (typeof certTypes)[keyof typeof certTypes];
 
 type FormattedError = {
   type: 'error';
@@ -50,30 +47,6 @@ export const formatProjectCompletedValidation = (
       };
 };
 
-/**
- * Format validation errors for /project-completed.
- *
- * @param errors An array of validation errors.
- * @returns Formatted errors that can be used in the response.
- */
-export const formatCertificationValidation = (
-  errors: ErrorObject[]
-): FormattedError => {
-  const error = getError(errors);
-
-  return error.instancePath === '' &&
-    Object.values(certTypes).includes(error.params.missingProperty as CertLogs)
-    ? ({
-        type: 'error',
-        message:
-          'You have not provided the valid param for us to display the certification.'
-      } as const)
-    : ({
-        type: 'error',
-        message: 'That does not appear to be a valid certification request.'
-      } as const);
-};
-
 /**
  * Format validation errors for /coderoad-challenge-completed.
  *