test: Revert Add e2e test trigger for fork PRs (#1662)

Reverts #1657

It did not work as expected

Author: Pijukatel

.github/workflows/on_pull_request_fork.yaml.yml

@@ -8,12 +8,6 @@ on:
   schedule:
     - cron: '0 6 * * *'
 
-  # Runs when invoked by another workflow.
-  workflow_call:
-    secrets:
-      APIFY_TEST_USER_API_TOKEN:
-        required: true
-
 concurrency:
   group: scheduled-tests
   cancel-in-progress: false