bump @actions/attest from 1.4.1 to 1.4.2 (#225)

Signed-off-by: Brian DeHamer <bdehamer@github.com>

src/main.ts

@@ -1,21 +1,14 @@
 import { buildSLSAProvenancePredicate } from '@actions/attest'
 import * as core from '@actions/core'
 
-const VALID_SERVER_URLS = [
-  'https://github.com',
-  new RegExp('^https://[a-z0-9-]+\\.ghe\\.com$')
-] as const
-
 /**
  * The main function for the action.
  * @returns {Promise<void>} Resolves when the action is complete.
  */
 export async function run(): Promise<void> {
   try {
-    const issuer = getIssuer()
-
     // Calculate subject from inputs and generate provenance
-    const predicate = await buildSLSAProvenancePredicate(issuer)
+    const predicate = await buildSLSAProvenancePredicate()
 
     core.setOutput('predicate', predicate.params)
     core.setOutput('predicate-type', predicate.type)
@@ -25,21 +18,3 @@ export async function run(): Promise<void> {
     core.setFailed(error.message)
   }
 }
-
-// Derive the current OIDC issuer based on the server URL
-function getIssuer(): string {
-  const serverURL = process.env.GITHUB_SERVER_URL || 'https://github.com'
-
-  // Ensure the server URL is a valid GitHub server URL
-  if (!VALID_SERVER_URLS.some(valid_url => serverURL.match(valid_url))) {
-    throw new Error(`Invalid server URL: ${serverURL}`)
-  }
-
-  let host = new URL(serverURL).hostname
-
-  if (host === 'github.com') {
-    host = 'githubusercontent.com'
-  }
-
-  return `https://token.actions.${host}`
-}