fix: remove monad and gnosis from portals as it's no longer supported

[premiumjibles]

Description

Portals api is throwing errors that it currently doesn't support Gnosis and Monad even though the docs say it does. The API on the explore page on mobile returns status 400 : "each value in networks must be one of the following values: ethereum, optimism, arbitrum, polygon, avalanche, bsc, base, sonic, hyperevm". Removing it for now to un-break the explore page but we can check later if this gets fixed on their end and revert.

Issue (if applicable)

closes #11652

Risk

Low risk, we could lose access to some gnosis stuff on portals but it's already completely breaking some pages.

High Risk PRs Require 2 approvals

What protocols, transaction types, wallets or contract interactions might be affected by this PR?

Testing

• Explore page on mobile loads ok when clicking into sub sections
• Sanity check swaps to and from gnosis show up with quotes
• Make sure one click defi still loads as expected on the markets page

Engineering

Operations

• 🏁 My feature is behind a flag and doesn't require operations testing (yet)

Screenshots (if applicable)

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR removes Gnosis and Monad chain support from the Portals swapper integration by deleting chain ID imports and their corresponding mappings across three files. The changes eliminate chains that are no longer supported in the swap routing logic.

Changes

Cohort / File(s)	Summary
Portals chain mapping removals packages/swapper/src/swappers/PortalsSwapper/constants.ts, src/lib/portals/constants.ts, src/state/apis/portals/utils.ts	Removed Gnosis and Monad chain support by deleting chain ID mappings from CHAIN_ID_TO_PORTALS_NETWORK and PORTALS_NETWORKS_TO_CHAIN_ID_MAP constants, and removed SupportedPortalsNetwork.Gnosis enum member. Chains no longer resolve in Portals swapper lookups.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Suggested reviewers

• gomesalexandre
• NeOMakinG

Poem

🐰 Gnosis and Monad wave goodbye,
As Portals chains streamline and fly,
Mappings removed with surgical care,
Cleaner networks float through the air! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: removing Monad and Gnosis support from Portals, which directly addresses the root cause of the 'No results found' issue on the Explore page.
Linked Issues check	✅ Passed	The code changes successfully remove Monad and Gnosis from Portals support, directly addressing the Portals API errors that were causing the 'No results found' issue on the Explore page.
Out of Scope Changes check	✅ Passed	All changes are scoped to removing Monad and Gnosis from Portals support across three files, with no unrelated modifications or out-of-scope alterations detected.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch 11652_fix_portals

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[NeOMakinG]

Clean removal, makes sense to disable until Portals actually supports these networks

Here we go, now it's clickable again!