Update cache service APIs & cleanup

packages/cache/src/internal/config.ts

@@ -1,11 +1,3 @@
-export function getRuntimeToken(): string {
-  const token = process.env['ACTIONS_RUNTIME_TOKEN']
-  if (!token) {
-    throw new Error('Unable to get the ACTIONS_RUNTIME_TOKEN env variable')
-  }
-  return token
-}
-
 export function getCacheServiceVersion(): string {
   return process.env['ACTIONS_CACHE_SERVICE_V2'] ? 'v2' : 'v1'
 }