Remove stale comment "This is an alpha release and is not ...." in all files

[huof6829]

Description

Fixes #3710

Type of change

Please delete options that are not relevant.

• [] Bug fix (non-breaking change which fixes an issue)
• [] New feature (non-breaking change which adds functionality)
• [] Code refactor or improvement
• [] Breaking change (fix or feature that would cause a new or changed behavior of existing functionality)
• [] This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [] make test
• [] fullsync
• [] Other test (please specify)

Test Configuration:

• Firmware version:
• Hardware:
• Toolchain:
• SDK:

Checklist:

• [] My code follows the style guidelines of this project
• [] I have performed a self-review of my code
• [] I have commented my code, particularly in hard-to-understand areas
• [] I have made corresponding changes to the documentation
• [] My changes generate no new warnings
• [] I have added tests that prove my fix is effective or that my feature works
• [] New and existing unit tests pass locally with my changes
• [] Any dependent changes have been merged and published in downstream modules

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

Merging #3713 (a38ccef) into master (263ff82) will decrease coverage by 0.49%.
The diff coverage is 80.35%.

❗ Current head a38ccef differs from pull request most recent head e2c4ca6. Consider uploading reports for the commit e2c4ca6 to get more accurate results

@@            Coverage Diff             @@
##           master    #3713      +/-   ##
==========================================
- Coverage   74.47%   73.98%   -0.50%     
==========================================
  Files         269      291      +22     
  Lines       23925    24710     +785     
==========================================
+ Hits        17818    18281     +463     
- Misses       5174     5497     +323     
+ Partials      933      932       -1     

Impacted Files	Coverage Δ
action/actctx.go	84.37% <ø> (ø)
action/action.go	82.35% <ø> (ø)
action/action_deserializer.go	57.14% <ø> (ø)
action/builder.go	80.34% <ø> (ø)
action/candidate_update.go	93.02% <ø> (ø)
action/claimreward.go	58.33% <ø> (ø)
action/consignment_transfer.go	90.41% <ø> (ø)
action/const.go	100.00% <ø> (ø)
action/depositreward.go	58.33% <ø> (ø)
action/execution.go	83.78% <ø> (ø)
... and 262 more

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