fix: duplicate fee display for l2 networks

[jpuri]

Description

Fix duplicate display of l1, l2 fees for l2 networks.

Related issues

Fixes: #23291

Manual testing steps

1. Switch to optimism
2. Submit legacy transaction in test dapp
3. Check transaction screen

Screenshots/Recordings

Pre-merge author checklist

• I’ve followed MetaMask 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.

[sleepytanya]

@jpuri Looks perfect!
With Simulations toggle ON:

With Simulations toggle OFF:

[CodyD42010]

[seaona]

🟢 Looks good from my side too @jpuri gas L1/L2 section is not duplicated anymore and only appears in the Details section

[metamaskbot]

Builds ready [db06164]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

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

Page Load Metrics (704 ± 542 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	57	156	77	22	11
		domContentLoaded	9	28	11	4	2
		load	45	2909	704	1128	542
		domInteractive	8	28	11	4	2

Bundle size diffs

• background: 0 Bytes (0.00%)
• ui: -902 Bytes (-0.01%)
• common: 0 Bytes (0.00%)