Revert #4808 fix. Due to #12591 and investigations.

[kirsan31]

Fix #12591.
This revert #4808 fix commit from #11358 PR.

The clean up of DisplayedItems after removal has already been implemented in DoLayoutIfHandleCreated but only if handle is created:

winforms/src/System.Windows.Forms/src/System/Windows/Forms/Controls/ToolStrips/ToolStrip.cs

Lines 3218 to 3224 in 034543a

	protected internal virtual void OnItemRemoved(ToolStripItemEventArgs e)
	{
	// clear cached item states.
	OnItemVisibleChanged(e, performLayout: true);
	((ToolStripItemEventHandler?)Events[s_eventItemRemoved])?.Invoke(this, e);
	}

winforms/src/System.Windows.Forms/src/System/Windows/Forms/Controls/ToolStrips/ToolStrip.cs

Lines 3244 to 3247 in 034543a

	if (performLayout)
	{
	DoLayoutIfHandleCreated(e);
	}

So we have leak only if handle is destroyed (#4808 case) and we didn't take this into account :(
All are much more complicated than originally intended. And lead to some side affect see this comment.

I think that is safer to revert the fix and reopen #4808 then.

Microsoft Reviewers: Open in CodeFlow

[kirsan31]

Can #4808 be opened for comments? I want to add some for the possible future editors...

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 50.05114%. Comparing base (aaac41d) to head (87a65cb).
Report is 22 commits behind head on main.

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HEAD has 2 uploads less than BASE

Flag	BASE (aaac41d)	HEAD (87a65cb)
Debug	3	2
test	1	0

Additional details and impacted files

@@                 Coverage Diff                  @@
##                main      #12729          +/-   ##
====================================================
- Coverage   76.03780%   50.05114%   -25.98667%     
====================================================
  Files           3181        1996        -1185     
  Lines         639670      284531      -355139     
  Branches       47215       41781        -5434     
====================================================
- Hits          486391      142411      -343980     
+ Misses        149759      139411       -10348     
+ Partials        3520        2709         -811     

Flag	Coverage Δ
Debug	50.05114% <100.00000%> (-25.98667%)	⬇️
integration	18.16600% <100.00000%> (-0.00781%)	⬇️
production	50.05114% <100.00000%> (+0.21861%)	⬆️
test	?
unit	47.26128% <100.00000%> (+0.20606%)	⬆️

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