[DX] Remove AddDefaultValueForUndefinedVariableRector as can generate broken code and depends on context #4729
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… broken code and depends on context
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This rule can cause errors in case of added/new/removed variables, as it can think that just removed variable should be added :)
It can cause crashes like these: #4702 (comment)
There was ❗ 9 extra test that colided with other rules just to be sure it doesn't colide with each other. Still not good enough.
Also missing variable raises a warning, so not really deprecation: https://3v4l.org/nMR15
Better let PHPStan report it and fix propperly 👍