Good morning Pranjal,
You can hide the authorization tab in PFCG (in main transaction window), but I think that it is for specific user:
In PFCG you can go to: Goto/Settings and select: "Simple Mainentance"
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And when you enter to display any role you dont look the "Authorization" tab:
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Clik here to view.
I hope that you can fix your problem.
Best regards.
