[MMI] Deletes unnecessary logic for mmi

[zone-live]

Explanation

MMI no longer needs this bit of logic 🧹

Pre-merge author checklist

• I've clearly explained:
  • What problem this PR is solving
  • How this problem was solved
  • How reviewers can test my changes
• Sufficient automated test coverage has been added

[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.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (0107c2c) 68.49% compared to head (ab9b9d3) 68.52%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #20834      +/-   ##
===========================================
+ Coverage    68.49%   68.52%   +0.03%     
===========================================
  Files         1012     1011       -1     
  Lines        40588    40540      -48     
  Branches     10843    10832      -11     
===========================================
- Hits         27799    27779      -20     
+ Misses       12789    12761      -28     

Files	Coverage Δ
app/scripts/controllers/mmi-controller.js	15.00% <100.00%> (-2.39%)	⬇️
...cripts/lib/rpc-method-middleware/handlers/index.js	100.00% <ø> (ø)
app/scripts/metamask-controller.js	53.88% <ø> (+0.03%)	⬆️

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[metamaskbot]

Builds ready [ab9b9d3]

• 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
  • common: 0, 1, 2, 3, 4, 5, 6, 7
  • content-script: 0
  • contentscript: contentscript
  • disable-console: disable-console
  • inpage: inpage
  • policy-load: policy-load
  • sentry-install: sentry-install
  • ui: 0, 1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (1255 ± 364 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	81	131	102	15	7
		domContentLoaded	75	145	97	19	9
		load	89	1940	1255	759	364
		domInteractive	75	145	97	19	9

Bundle size diffs

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