Basically, the blogger
widget script bundle is very useful and functions to run blogger widgets such
as comment form widgets, contact forms, feeds, and others. But when the widgets
are not installed then the bundle script automatically does not work or becomes
unused javascript.
Then even though all the
widgets are installed on your blog, the location of the widgets may be on
different pages so that still on some pages unused javascript will be detected
when tested with Google PageSpeed Insights.
So, the best solution for
dealing with unused javascript is to disable the blogger widget bundle script
so that it is not detected as unused javascript, the method is as follows:

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