CLI-1482: cx-api-spec 0.169.0 / remove email commands

[danepowell]

Motivation

Fixes CLI-1482

Proposed changes

Remove the email commands since the API endpoints backing these have been removed.

Alternatives considered

Testing steps

1. Follow the contribution guide to set up your development environment or download a pre-built acli.phar for this PR.
2. If running from source, clear the kernel cache to pick up new and changed commands: ./bin/acli ckc
3. Check for regressions: (add specific steps for this pr)
4. Check new functionality: (add specific steps for this pr)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.28%. Comparing base (a448d71) to head (31137a6).
Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1845      +/-   ##
============================================
- Coverage     92.92%   92.28%   -0.64%     
+ Complexity     1847     1778      -69     
============================================
  Files           123      121       -2     
  Lines          6968     6626     -342     
============================================
- Hits           6475     6115     -360     
- Misses          493      511      +18     

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[github-actions]

Try the dev build for this PR: https://acquia-cli.s3.amazonaws.com/build/pr/1845/acli.phar

curl -OL https://acquia-cli.s3.amazonaws.com/build/pr/1845/acli.phar
chmod +x acli.phar