Remove prerelease checker notification

[IanMatthewHuff]

Fixes #11477

• Pull request represents a single change (i.e. not fixing disparate/unrelated things in a single PR).
• Title summarizes what is changing.
• Has a news entry file (remember to thank yourself!).
• Appropriate comments and documentation strings in the code.
• Has sufficient logging.
• Has telemetry for feature-requests.
• Unit tests & system/integration tests are added/updated.
• Test plan is updated as appropriate.
• package-lock.json has been regenerated by running npm install (if dependencies have changed).

[codecov-commenter]

Codecov Report

Merging #11527 (d8919d1) into main (0271863) will decrease coverage by 0%.
The diff coverage is n/a.

@@          Coverage Diff           @@
##            main   #11527   +/-   ##
======================================
- Coverage     63%      63%   -1%     
======================================
  Files        477      476    -1     
  Lines      34182    34096   -86     
  Branches    5546     5537    -9     
======================================
- Hits       21605    21537   -68     
+ Misses     10518    10497   -21     
- Partials    2059     2062    +3     

Impacted Files	Coverage Δ
src/platform/common/utils/localize.ts	76% <ø> (-1%)	⬇️
src/platform/serviceRegistry.node.ts	100% <ø> (ø)
.../notebooks/controllers/controllerDefaultService.ts	65% <0%> (-9%)	⬇️
...rc/platform/common/application/applicationShell.ts	24% <0%> (-4%)	⬇️
src/notebooks/telemetry/kernelTelemetry.ts	85% <0%> (-4%)	⬇️
src/kernels/installer/productInstaller.node.ts	78% <0%> (-2%)	⬇️
src/kernels/execution/cellExecution.ts	72% <0%> (-2%)	⬇️
...otebooks/controllers/controllerPreferredService.ts	85% <0%> (-1%)	⬇️
...els/raw/finder/pythonKernelInterruptDaemon.node.ts	20% <0%> (-1%)	⬇️
src/kernels/raw/launcher/kernelProcess.node.ts	73% <0%> (-1%)	⬇️
... and 15 more