Fix lint errors on commit 5892d7cdc

[danjm]

Fixes lint errors and e2e failures on v11.16.12, which would have been introduced during conflict resolution when cherry-picking #24605

Specifically:

• test/e2e/default-fixture.js is deleted as that file does not exist on master yet and is not used. However, importantly, the change made in test/e2e/default-fixture.js in feat: adds "data collection for marketing" toggles #24605 is now applied to test/e2e/fixture-builder.js (this was needed for e2e tests to pass)
• delete ui/pages/settings/security-tab/metametrics-toggle/metametrics-toggle.tsx and the associated test file, as these seem to be unused
• delete unused variables in ui/pages/settings/security-tab/security-tab.component.js

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (Version-v11.16.12@c6dbd72). Learn more about missing BASE report.

Additional details and impacted files

@@                 Coverage Diff                  @@
##             Version-v11.16.12   #25367   +/-   ##
====================================================
  Coverage                     ?   67.30%           
====================================================
  Files                        ?     1266           
  Lines                        ?    49744           
  Branches                     ?    12924           
====================================================
  Hits                         ?    33477           
  Misses                       ?    16267           
  Partials                     ?        0           

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[metamaskbot]

Builds ready [c9a7892]

• 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, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (322 ± 295 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	68	160	102	22	11
		domContentLoaded	10	42	21	9	4
		load	46	2227	322	614	295
		domInteractive	10	42	21	9	4