Cannot run `helm-do-ag-this-file-or-occur` function

[ccqpein]

• GNU Emacs 30.0.50 (build 1, aarch64-apple-darwin22.3.0, NS appkit-2299.40 Version 13.2 (Build 22D49)) of 2023-02-01
• macOS 13.2

Actual behavior

M-x helm-do-ag-this-file-or-occur doesn't show anything.

Expected behavior

should have one command there.

Steps to reproduce

M-x helm-do-ag-this-file-or-occur

[ccqpein]

I find #368 revert the feature of helm-do-ag-this-file-or-occur. Maybe we can just change the README?