[excel] (Support) Remove comment about Scripts requiring SKUs with desktop apps

[AlexJerabek]

E1 licenses are web-only, so this SKU clarification is obsolete.

[learn-build-service-prod[bot]]

Learn Build status updates of commit 1eb814c:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
docs/includes/platform-requirements.md	:white_check_mark:Succeeded	View

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