[MMI] Added code fence to remove backup notice

[albertolive]

Explanation

In the institutional build, we don't want to show the backup notice because the keys are stored in the custodian.

AC:

• The backup message does not popup anymore

Ticket:
https://consensyssoftware.atlassian.net/browse/MMI-3342

Pre-merge author checklist

• I've clearly explained:
  • What problem this PR is solving
  • How this problem was solved

Pre-merge reviewer checklist

• Manual testing (e.g. pull and build branch, run in browser, test code being changed)
• PR is linked to the appropriate GitHub issue

[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 [731f2f8]

• builds: chrome, firefox
• builds (beta): chrome
• builds (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
  • 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 (1473 ± 33 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	105	139	116	9	5
		domContentLoaded	1372	1615	1473	68	33
		load	1373	1615	1473	68	33
		domInteractive	1372	1615	1473	68	33

[codecov]

Codecov Report

Merging #19840 (731f2f8) into develop (6bb5e69) will not change coverage.
The diff coverage is 12.50%.

@@           Coverage Diff            @@
##           develop   #19840   +/-   ##
========================================
  Coverage    69.70%   69.70%           
========================================
  Files          982      982           
  Lines        37071    37071           
  Branches      9944     9944           
========================================
  Hits         25840    25840           
  Misses       11231    11231           

Impacted Files	Coverage Δ
ui/pages/home/home.component.js	44.39% <12.50%> (ø)