fix: Remove obsolete NetworkController state

[Gudahtt]

Description

Migration 120.2 has been updated to remove obsolete NetworkController state as well.

Related issues

Fixes #26297

Manual testing steps

N/A

Screenshots/Recordings

N/A

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.

[Gudahtt]

Blocked by #26298

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.03%. Comparing base (b22e018) to head (c17e849).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #26302      +/-   ##
===========================================
+ Coverage    70.02%   70.03%   +0.01%     
===========================================
  Files         1411     1411              
  Lines        49995    50008      +13     
  Branches     13805    13807       +2     
===========================================
+ Hits         35006    35019      +13     
  Misses       14989    14989              

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[metamaskbot]

Builds ready [c17e849]

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

Page Load Metrics (311 ± 267 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	86	322	135	63	30
		domContentLoaded	11	160	31	32	15
		load	49	1726	311	556	267
		domInteractive	11	160	31	32	15

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 396 Bytes (0.01%)
• ui: 0 Bytes (0.00%)
• common: 0 Bytes (0.00%)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[desi]

LGTM