fix: remove supported chains check

[vinistevam]

Description

Related issues

Fixes: https://github.com/MetaMask/MetaMask-planning/issues/3940

Manual testing steps

1. Go to the test dapp
2. Perform transactions and signatures in the section PPOM - Malicious Transactions and Signatures
3. Test one previous supported chain and another chain outside the list below:

// previous supported chains
ARBITRUM = '0xa4b1'
AVALANCHE = '0xa86a'
BASE = '0x2105'
BERACHAIN = '0x138d4'
BSC = '0x38'
LINEA_MAINNET = '0xe708'
MAINNET = '0x1'
METACHAIN_ONE = '0x1b6e6'
OPBNB = '0xcc'
OPTIMISM = '0xa'
POLYGON = '0x89'
SCROLL = '0x82750'
SEPOLIA = '0xaa36a7'
ZKSYNC_ERA = '0x144'

Screenshots/Recordings

Screencast.from.2025-01-28.14-56-38.webm

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[metamaskbot]

Builds ready [d5b9e39]

• builds: chrome, firefox
• builds (flask): chrome, firefox
• builds (MMI): chrome
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
  • content-script: 0
  • offscreen: 0

Page Load Metrics (1917 ± 161 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	358	2553	1831	470	226
		domContentLoaded	1499	2493	1892	328	157
		load	1532	2555	1917	335	161
		domInteractive	24	178	57	36	17
		backgroundConnect	9	80	34	23	11
		firstReactRender	16	177	53	39	18
		getState	5	101	30	28	14
		initialActions	0	1	0	0	0
		loadScripts	1049	1932	1396	269	129
		setupStore	7	101	17	21	10
		uiStartup	1721	3227	2253	457	219

Bundle size diffs [🚀 Bundle size reduced!]

• background: -491 Bytes (-0.01%)
• ui: 0 Bytes (0.00%)
• common: -826 Bytes (-0.01%)