[App Size reduction] Remove dark variation duplicate of blaze intro asset

[iamgabrielma]

Description

This PR removes illustraion.pdf from the asset library, removing 3.1MB from the pre-thinning build as part of reducing app size on WOOMOB-534 and using the same image to render as universal in both variants.

I'm not quite sure what this asset is doing, as is exactly the same as its light variant blaze-intro-illustration.pdf. Both also have the same transparency, so there's seem to be no palpable differences between assets.

Light	Dark

I'm not sure either how to trigger this onboarding without hardcoding the view somewhere in the app, so I'm adding Kiwi as reviewers. Please double check we don't crash due a missing asset, since we tend to use force unwrap around image assets.

Testing information

Blaze intro view should display as always, both light and dark modes.

[wpmobilebot]

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

	App Name	WooCommerce iOS Prototype
	Build Number	30495
	Version	PR #15763
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	99cb5b2
	Installation URL	7i7eqa5alrtvo

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.

[RafaelKayumov]

The additional PDF seems to be added in Update dark mode image for blaze intro illustration as a part of Blaze: Update dark mode color for intro view and campaign creation form

Both PDFs look identical to me and same for AI:

🧾 PDF Comparison Summary

Compared the following two PDF assets to evaluate redundancy:

• blaze-intro-illustration.pdf
• illustraion.pdf

✅ Result: Files are Identical

• No differences found in content, layout, vector graphics, or embedded text.
• Same number of pages and objects.
• Nearly identical file sizes.
• Suitable for both light and dark themes without visual conflict.

🧹 Recommendation

One of the files can be safely removed from the app bundle to reduce size without affecting functionality or visual appearance.