Revert "publish should be called when the state is changed"

[jaraco]

This reverts commit 20bc9db.

What kind of change does this PR introduce?

• bug fix
• feature
• docs update
• tests/coverage improvement
• refactoring
• other

What is the related issue number (starting with #)

#1759

What is the current behavior? (You can also link to an open issue here)

'main' event doesn't fire periodically on the bus

What is the new behavior (if this is a feature change)?

'main' event fires 10x per second

Other information:

Checklist:

• I think the code is well written
• I wrote good commit messages
• I have squashed related commits together after the changes have been approved
• Unit tests for the changes exist
• Integration tests for the changes exist (if applicable)
• I used the same coding conventions as the rest of the project
• The new code doesn't generate linter offenses
• Documentation reflects the changes
• The PR relates to only one subject with a clear title
  and description in grammatically correct, complete sentences

[codecov]

Codecov Report

Merging #1774 into master will decrease coverage by 0.08%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master   #1774      +/-   ##
=========================================
- Coverage   80.99%   80.9%   -0.09%     
=========================================
  Files         104     104              
  Lines       13643   13643              
=========================================
- Hits        11050   11038      -12     
- Misses       2593    2605      +12

[jaraco]

Now that we know this behavior was by design, I'd really like to have a test that captures the desired behavior (that 'main' is invoked periodically).