quick tested..

It is a Trados Studio PlugIn of mine.

which acts following order;
1. Put On Track changes mode
2. Delete all the contents of current target segment
3. Delte the last Track chaged mark - that should be "Deleted"
4. Change segment status into "nothing"
5. Put Track chages mode just like before step #1

and, If you needed, iterate the above steps again and again..

You could do all these steps only with "One Click"

quick tested..

It is a Trados Studio PlugIn of mine.

which acts following order;
1. Put On Track changes mode
2. Delete all the contents of current target segment
3. Delte the last Track chaged mark - that should be "Deleted"
4. Change segment status into "nothing"
5. Put Track chages mode just like before step #1

and, If you needed, iterate the above steps again and again..

You could do all these steps only with "One Click"

Question here is not how to remove tracked changes from a single segment, but about cleaning all target segments in one go, regardless if they are tracked or not.

I said "and, If you needed, iterate the above steps again and again.."
My PlugIn is OneClick only always.
That is what You wanted.

And
If there were not Track changed, Your answer is meaningless
because Trados Studio has the functionality You wanted OutOfBox already
under the function name "Clear Target Segment"
You can clean 1,000 or even 100,000 segments. Period.

hmm, let me help your understand of my PlugIn, again.

It deletes ALL content of a target segment regardless of trackChange and,
of course, ALL target segments content in a file, in ALL files or even in ALL projects with ONE/SiNGLE Click.