ref(node): Remove duplicate function isCjs (#18662)

While working on something else I stumbled over this unused, duplicated
function. Also, there was still one implementation in Google Cloud
Serverless, which checked for `typeof require !== 'undefined'`, which
does not work well all the time (see this PR:
#15927).


Closes #18663 (added automatically)

Author: s1gr1d

packages/cloudflare/src/utils/commonjs.ts

@@ -49,7 +49,8 @@
   },
   "dependencies": {
     "@sentry/core": "10.32.1",
-    "@sentry/node": "10.32.1"
+    "@sentry/node": "10.32.1",
+    "@sentry/node-core": "10.32.1"
   },
   "devDependencies": {
     "@google-cloud/bigquery": "^5.3.0",

packages/google-cloud-serverless/package.json

@@ -2,13 +2,10 @@ import type { Integration, Options } from '@sentry/core';
 import { applySdkMetadata } from '@sentry/core';
 import type { NodeClient, NodeOptions } from '@sentry/node';
 import { getDefaultIntegrationsWithoutPerformance, init as initNode } from '@sentry/node';
+import { isCjs } from '@sentry/node-core';
 import { googleCloudGrpcIntegration } from './integrations/google-cloud-grpc';
 import { googleCloudHttpIntegration } from './integrations/google-cloud-http';
 
-function isCjs(): boolean {
-  return typeof require !== 'undefined';
-}
-
 function getCjsOnlyIntegrations(): Integration[] {
   return isCjs()
     ? [