DSM: fix unintended scroll

[louismaximepiton]

Note: Please transform - [ ] into - (NA) in the description when things are not applicable

Related issues

Fixes #363.

Description

Remove unnecessary CSS for the embedded page

Motivation & Context

Remove useless scroll on the DSM page > Develop tab.

Types of change

• Bug fix (non-breaking which fixes an issue)

Checklist

Accessibility

• My change follows accessibility good practices

Design

• My change respects the design guidelines defined in Orange Design System
• My change is compatible with responsive display

Documentation

• My change introduces changes to the documentation and/or I have updated the documentation accordingly

Checklist (for Core Team only)

• Manually test on simulators and on a physical device (Android & iOS, orientation change, dark/light mode)
• Code review
• Design review
• A11y review

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[julien-deramond]

LGTM! I've checked on Zeroheight staging and it fixes the issue.

It can be backported to ODS Android and ODS iOS the same way.