Removes ImageSettingsDialogFragment which is not used anymore

[antonis]

Description

This PR removes ImageSettingsDialogFragment which is not used anymore as identified in #19568 (review)

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To Test:

• Verify that the app builds and the CI checks pass
• Verify that the editor opens and behaves as expected

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Regression Notes

1. Potential unintended areas of impact

Editor

2. What I did to test those areas of impact (or what existing automated tests I relied on)

Manual testing

3. What automated tests I added (or what prevented me from doing so)

N/A since this PR involves code cleanup

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PR Submission Checklist:

• I have completed the Regression Notes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

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UI Changes Testing Checklist:

• Portrait and landscape orientations.
• Light and dark modes.
• Fonts: Larger, smaller and bold text.
• High contrast.
• Talkback.
• Languages with large words or with letters/accents not frequently used in English.
• Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• Large and small screen sizes. (Tablet and smaller phones)
• Multi-tasking: Split screen and Pop-up view. (Android 10 or higher)

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack by scanning the QR code below to install the corresponding build.

	App Name	Jetpack
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr19658-e7938b7
	Commit	e7938b7
	Direct Download	jetpack-prototype-build-pr19658-e7938b7.apk

Note: Google Login is not supported on these builds.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress by scanning the QR code below to install the corresponding build.

	App Name	WordPress
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr19658-e7938b7
	Commit	e7938b7
	Direct Download	wordpress-prototype-build-pr19658-e7938b7.apk

Note: Google Login is not supported on these builds.

[antonis]

Converting to draft to figure out the CI failures

[peril-wordpress-mobile]

	Warnings
⚠️	PR has more than 300 lines of code changing. Consider splitting into smaller PRs if possible.

Generated by 🚫 dangerJS

[wpmobilebot]

	1 Warning
⚠️	This PR is larger than 300 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.

Generated by 🚫 Danger

[antonis]

Converting to draft to figure out the CI failures

Removed some extra unused resources with e7938b7 :)

[justtwago]

Nice code removal! Tested the editor and it seems to work as usual 👌

[antonis]

Thank you for reviewing Artyom 🙇