docs: remove dead blockchain chains from contract addresses

[devin-ai-integration]

Summary

Remove defunct blockchain chains from the Pyth price feed contract addresses documentation. These chains are no longer active and should not be listed in the docs.

EVM chains removed:

• Mainnets: Canto, EOS, EVMOS, Fantom, Horizen EON, Injective inEVM, ZKFair
• Testnets: Canto, EOS, EVMOS, Fantom, Injective inEVM, ZKFair, Horizen GOBI

Solana/SVM chains removed:

• Mantis Testnet and Mantis Mainnet (from both receiver and price feed program tables)

CosmWasm chains removed:

• Sei Atlantic 2 (Stable + Beta sections)
• Sei Pacific 1 (Stable section)

Rationale

These blockchain networks are no longer operational or have discontinued their Pyth integration. Keeping them in the documentation creates confusion for developers and misrepresents the current state of Pyth's supported networks.

How has this been tested?

• Current tests cover my changes
• Added new tests
• Manually tested the code

Documentation-only changes to MDX files. Verified that the correct chains were removed and that active chains (e.g., "Injective EVM") were preserved.

Reviewer Checklist

• Verify all removed chains are confirmed defunct
• Confirm "Injective EVM" (active) was preserved while "Injective inEVM" (defunct) was removed
• Check no unintended chains were removed

---

Link to Devin run: https://app.devin.ai/sessions/1a58796a8d36456f88b8cdfeee02dd4a
Requested by: nidhi@dourolabs.xyz (@nidhi-singh02)

[devin-ai-integration]

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[nidhi-singh02]

do you see any other chain that is no longer used ?

[devin-ai-integration]

I don't see any obviously dead chains beyond the ones you explicitly requested to remove.

However, I did notice some potentially outdated testnets that use deprecated networks:

• Boba Goerli
• Linea Goerli
• Mumbai (Polygon's deprecated testnet, replaced by Amoy)
• Optimism Goerli
• zkSync Era Goerli

These are based on Goerli/Mumbai which are being deprecated in favor of Sepolia/Amoy, but I didn't remove them since Pyth may still have active deployments there that some developers rely on.

Let me know if you'd like me to remove any of these in this PR or a follow-up, or if you'd like a more data-driven audit (e.g., checking which chains have had no price updates recently).

[nidhi-singh02]

lgtm!

[nidhi-singh02]

I don't see any obviously dead chains beyond the ones you explicitly requested to remove.

However, I did notice some potentially outdated testnets that use deprecated networks:

• Boba Goerli
• Linea Goerli
• Mumbai (Polygon's deprecated testnet, replaced by Amoy)
• Optimism Goerli
• zkSync Era Goerli

These are based on Goerli/Mumbai which are being deprecated in favor of Sepolia/Amoy, but I didn't remove them since Pyth may still have active deployments there that some developers rely on.

do the data drive approach to check.

[devin-ai-integration]

Data-Driven Analysis Results

I checked each of the potentially outdated testnets by visiting their block explorers. Here are the findings:

Testnet	Status	Evidence
Boba Goerli	DEAD	Only 1 transaction ever (contract creation from 2 years ago)
Linea Goerli	DEAD	Explorer returns 503 Service Unavailable
Mumbai (Polygon)	DEAD	Explorer DNS doesn't resolve (domain no longer exists)
Optimism Goerli	DEAD	Explorer returns 522 Connection Timed Out
zkSync Era Goerli	DEAD	Explorer redirects to Sepolia (Goerli explorer no longer exists)

Recommendation: All 5 testnets should be removed from the documentation. The explorers are either completely down or show no activity, confirming these networks are deprecated.

Would you like me to remove these in this PR or create a follow-up PR?

[nidhi-singh02]

However, I did notice some potentially outdated testnets that use deprecated networks:

• Boba Goerli
• Linea Goerli
• Mumbai (Polygon's deprecated testnet, replaced by Amoy)
• Optimism Goerli
• zkSync Era Goerli

These are based on Goerli/Mumbai which are being deprecated in favor of Sepolia/Amoy

create a new PR to remove these.